Create a new room in a space (#6061)

* Add `SpaceService.editableSpaces` and `SpaceService.addChildToSpace`

* Add `parentSpace` to `CreateRoomConfig`

* Allow setting a parent space to a room in `ConfigureRoomPresenter`, make sure the room is added to the parent space when creating it

* `ConfigureRoomPresenter`: Load the list of possible spaces a room can be added to

* Refactor `RoomVisibilityState` to internally use `JoinRuleItem`

This gets rid of `RoomAccess` and `RoomAccessItem`, and it will allow us to map the join rule items in a cleaner way to both join rules and the UI

* Implement the UI changes:

- Display the parent space.
- Allow selecting a new one.
- Import needed strings.

* Fix existing tests

* Add `@Immutable` annotation to `SpaceRoom`, since it was detected as unstable.

Maybe because of `RoomType`?

* Update screenshots

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Co-authored-by: ElementBot <android@element.io>

libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/spaces/RustSpaceService.kt

@@ -87,6 +87,12 @@ class RustSpaceService(
         )
     }
 
+    override suspend fun editableSpaces(): Result<List<SpaceRoom>> = withContext(sessionDispatcher) {
+        runCatchingExceptions {
+            innerSpaceService.editableSpaces().map(spaceRoomMapper::map)
+        }
+    }
+
     override fun getLeaveSpaceHandle(spaceId: RoomId): LeaveSpaceHandle {
         return RustLeaveSpaceHandle(
             id = spaceId,