Auto generate dark mode previews and screenshots (#776)

With this change, composable previews and screenshots should be created with just:
```
@ElementPreviews
@Composable
fun MyViewPreview() {
    ElementPreview { 
        MyView()
    }
}
```

- Adds `@ElementPreviews` which is a shorthand for:
```
@Preview(name = "D")
@Preview(name = "N", uiMode = Configuration.UI_MODE_NIGHT_YES)
```
Should be used in connection with the now public `fun ElementPreview()` composable.

- Adds ElementPreviews to previewAnnotations in dangerfile
- Screenshots of night mode previews are now rendered with night mode
- Replaces `ElementPreviewLight` and `ElementThemedPreview` with `ElementPreview`
- Deprecates `ElementPreviewDark` which should be removed.
- Remaining usages of `ElementPreviewDark` are now ignored during screenshot tests

features/roomdetails/impl/src/main/kotlin/io/element/android/features/roomdetails/impl/RoomDetailsView.kt

@@ -65,8 +65,8 @@ import io.element.android.libraries.designsystem.components.button.BackButton
 import io.element.android.libraries.designsystem.components.button.MainActionButton
 import io.element.android.libraries.designsystem.components.preferences.PreferenceCategory
 import io.element.android.libraries.designsystem.components.preferences.PreferenceText
+import io.element.android.libraries.designsystem.preview.ElementPreview
 import io.element.android.libraries.designsystem.preview.ElementPreviewDark
-import io.element.android.libraries.designsystem.preview.ElementPreviewLight
 import io.element.android.libraries.designsystem.preview.LargeHeightPreview
 import io.element.android.libraries.designsystem.theme.components.DropdownMenu
 import io.element.android.libraries.designsystem.theme.components.DropdownMenuItem
@@ -322,8 +322,9 @@ internal fun OtherActionsSection(onLeaveRoom: () -> Unit, modifier: Modifier = M
 
 @LargeHeightPreview
 @Composable
-fun RoomDetailsLightPreview(@PreviewParameter(RoomDetailsStateProvider::class) state: RoomDetailsState) =
-    ElementPreviewLight { ContentToPreview(state) }
+fun RoomDetailsLightPreview(@PreviewParameter(RoomDetailsStateProvider::class) state: RoomDetailsState) {
+    ElementPreview { ContentToPreview(state) }
+}
 
 @LargeHeightPreview
 @Composable

features/roomdetails/impl/src/main/kotlin/io/element/android/features/roomdetails/impl/edit/RoomDetailsEditView.kt

@@ -53,7 +53,7 @@ import androidx.compose.ui.input.pointer.pointerInput
 import androidx.compose.ui.platform.LocalFocusManager
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontWeight
-import androidx.compose.ui.tooling.preview.Preview
+import io.element.android.libraries.designsystem.preview.ElementPreviews
 import androidx.compose.ui.tooling.preview.PreviewParameter
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
@@ -66,8 +66,8 @@ import io.element.android.libraries.designsystem.components.avatar.AvatarData
 import io.element.android.libraries.designsystem.components.avatar.AvatarSize
 import io.element.android.libraries.designsystem.components.button.BackButton
 import io.element.android.libraries.designsystem.components.dialogs.ErrorDialog
+import io.element.android.libraries.designsystem.preview.ElementPreview
 import io.element.android.libraries.designsystem.preview.ElementPreviewDark
-import io.element.android.libraries.designsystem.preview.ElementPreviewLight
 import io.element.android.libraries.designsystem.theme.components.CenterAlignedTopAppBar
 import io.element.android.libraries.designsystem.theme.components.Icon
 import io.element.android.libraries.designsystem.theme.components.Scaffold
@@ -286,12 +286,13 @@ private fun Modifier.clearFocusOnTap(focusManager: FocusManager): Modifier =
         })
     }
 
-@Preview
+@ElementPreviews
 @Composable
-fun RoomDetailsEditViewLightPreview(@PreviewParameter(RoomDetailsEditStateProvider::class) state: RoomDetailsEditState) =
-    ElementPreviewLight { ContentToPreview(state) }
+fun RoomDetailsEditViewLightPreview(@PreviewParameter(RoomDetailsEditStateProvider::class) state: RoomDetailsEditState) {
+    ElementPreview { ContentToPreview(state) }
+}
 
-@Preview
+@ElementPreviews
 @Composable
 fun RoomDetailsEditViewDarkPreview(@PreviewParameter(RoomDetailsEditStateProvider::class) state: RoomDetailsEditState) =
     ElementPreviewDark { ContentToPreview(state) }

features/roomdetails/impl/src/main/kotlin/io/element/android/features/roomdetails/impl/invite/RoomInviteMembersView.kt

@@ -30,15 +30,15 @@ import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontWeight
-import androidx.compose.ui.tooling.preview.Preview
+import io.element.android.libraries.designsystem.preview.ElementPreviews
 import androidx.compose.ui.tooling.preview.PreviewParameter
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import io.element.android.features.roomdetails.impl.R
 import io.element.android.libraries.designsystem.components.avatar.AvatarSize
 import io.element.android.libraries.designsystem.components.button.BackButton
+import io.element.android.libraries.designsystem.preview.ElementPreview
 import io.element.android.libraries.designsystem.preview.ElementPreviewDark
-import io.element.android.libraries.designsystem.preview.ElementPreviewLight
 import io.element.android.libraries.designsystem.theme.components.CenterAlignedTopAppBar
 import io.element.android.libraries.designsystem.theme.components.Divider
 import io.element.android.libraries.designsystem.theme.components.Scaffold
@@ -219,12 +219,13 @@ private fun RoomInviteMembersSearchBar(
     )
 }
 
-@Preview
+@ElementPreviews
 @Composable
-fun RoomInviteMembersLightPreview(@PreviewParameter(RoomInviteMembersStateProvider::class) state: RoomInviteMembersState) =
-    ElementPreviewLight { ContentToPreview(state) }
+fun RoomInviteMembersLightPreview(@PreviewParameter(RoomInviteMembersStateProvider::class) state: RoomInviteMembersState) {
+    ElementPreview { ContentToPreview(state) }
+}
 
-@Preview
+@ElementPreviews
 @Composable
 fun RoomInviteMembersDarkPreview(@PreviewParameter(RoomInviteMembersStateProvider::class) state: RoomInviteMembersState) =
     ElementPreviewDark { ContentToPreview(state) }

features/roomdetails/impl/src/main/kotlin/io/element/android/features/roomdetails/impl/members/RoomMemberListView.kt

@@ -38,7 +38,7 @@ import androidx.compose.ui.res.pluralStringResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextAlign
-import androidx.compose.ui.tooling.preview.Preview
+import io.element.android.libraries.designsystem.preview.ElementPreviews
 import androidx.compose.ui.tooling.preview.PreviewParameter
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
@@ -47,8 +47,8 @@ import io.element.android.libraries.architecture.Async
 import io.element.android.libraries.designsystem.ElementTextStyles
 import io.element.android.libraries.designsystem.components.avatar.AvatarSize
 import io.element.android.libraries.designsystem.components.button.BackButton
+import io.element.android.libraries.designsystem.preview.ElementPreview
 import io.element.android.libraries.designsystem.preview.ElementPreviewDark
-import io.element.android.libraries.designsystem.preview.ElementPreviewLight
 import io.element.android.libraries.designsystem.theme.components.CenterAlignedTopAppBar
 import io.element.android.libraries.designsystem.theme.components.CircularProgressIndicator
 import io.element.android.libraries.designsystem.theme.components.Scaffold
@@ -259,12 +259,13 @@ private fun RoomMemberSearchBar(
     )
 }
 
-@Preview
+@ElementPreviews
 @Composable
-fun RoomMemberListLightPreview(@PreviewParameter(RoomMemberListStateProvider::class) state: RoomMemberListState) =
-    ElementPreviewLight { ContentToPreview(state) }
+fun RoomMemberListLightPreview(@PreviewParameter(RoomMemberListStateProvider::class) state: RoomMemberListState) {
+    ElementPreview { ContentToPreview(state) }
+}
 
-@Preview
+@ElementPreviews
 @Composable
 fun RoomMemberListDarkPreview(@PreviewParameter(RoomMemberListStateProvider::class) state: RoomMemberListState) =
     ElementPreviewDark { ContentToPreview(state) }

features/roomdetails/impl/src/main/kotlin/io/element/android/features/roomdetails/impl/members/details/RoomMemberDetailsView.kt

@@ -51,8 +51,8 @@ import io.element.android.libraries.designsystem.components.button.BackButton
 import io.element.android.libraries.designsystem.components.button.MainActionButton
 import io.element.android.libraries.designsystem.components.preferences.PreferenceCategory
 import io.element.android.libraries.designsystem.components.preferences.PreferenceText
+import io.element.android.libraries.designsystem.preview.ElementPreview
 import io.element.android.libraries.designsystem.preview.ElementPreviewDark
-import io.element.android.libraries.designsystem.preview.ElementPreviewLight
 import io.element.android.libraries.designsystem.preview.LargeHeightPreview
 import io.element.android.libraries.designsystem.theme.components.Scaffold
 import io.element.android.libraries.designsystem.theme.components.Text
@@ -146,8 +146,9 @@ internal fun SendMessageSection(onSendMessage: () -> Unit, modifier: Modifier =
 
 @LargeHeightPreview
 @Composable
-fun RoomMemberDetailsViewLightPreview(@PreviewParameter(RoomMemberDetailsStateProvider::class) state: RoomMemberDetailsState) =
-    ElementPreviewLight { ContentToPreview(state) }
+fun RoomMemberDetailsViewLightPreview(@PreviewParameter(RoomMemberDetailsStateProvider::class) state: RoomMemberDetailsState) {
+    ElementPreview { ContentToPreview(state) }
+}
 
 @LargeHeightPreview
 @Composable