Force last owner of a room to pass ownership when leaving (#5094)

* Move `ChangeRoles*` classes to their own module so they can be shared

* Hook the change roles screen to the leave room action, add confirmation dialogs

* Use enum instead of sealed interface for `ChangeRoomMemberRolesListType`

* Try to improve communications between nodes

* refactor (leave room) : makes sure to expose only necessary code from api module

* Add `:libraries:previewutils` module to share some test fixtures used for UI previews

* Update screenshots

---------

Co-authored-by: ElementBot <android@element.io>
Co-authored-by: ganfra <francoisg@matrix.org>

features/changeroommemberroles/api/build.gradle.kts

@@ -0,0 +1,27 @@
+import extension.setupAnvil
+
+/*
+ * Copyright 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+plugins {
+    id("io.element.android-library")
+    id("kotlin-parcelize")
+}
+
+android {
+    namespace = "io.element.android.features.changeroommemberroles.api"
+}
+
+setupAnvil()
+
+dependencies {
+    implementation(projects.anvilannotations)
+    implementation(projects.libraries.architecture)
+    implementation(projects.libraries.core)
+    implementation(projects.libraries.matrix.api)
+    api(projects.libraries.usersearch.api)
+}

features/changeroommemberroles/api/src/main/kotlin/io/element/android/features/changeroommemberroes/api/ChangeRoomMemberRolesEntryPoint.kt

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.changeroommemberroes.api
+
+import com.bumble.appyx.core.modality.BuildContext
+import com.bumble.appyx.core.node.Node
+import io.element.android.libraries.architecture.FeatureEntryPoint
+import io.element.android.libraries.architecture.NodeInputs
+import io.element.android.libraries.matrix.api.core.RoomId
+import io.element.android.libraries.matrix.api.room.JoinedRoom
+
+interface ChangeRoomMemberRolesEntryPoint : FeatureEntryPoint {
+    fun builder(parentNode: Node, buildContext: BuildContext): Builder
+
+    interface Builder {
+        fun room(room: JoinedRoom): Builder
+        fun listType(changeRoomMemberRolesListType: ChangeRoomMemberRolesListType): Builder
+        fun build(): Node
+    }
+
+    interface NodeProxy {
+        val roomId: RoomId
+        suspend fun waitForRoleChanged()
+    }
+}
+
+enum class ChangeRoomMemberRolesListType : NodeInputs {
+    SelectNewOwnersWhenLeaving,
+    Admins,
+    Moderators
+}