Split MatrixRoom into BaseRoom and JoinedRoom (#4561)

`JoinedRoom` will now contain both a mandatory live timeline reference and all the functionality associated to it.

`BaseRoom` on the other hand will contain only functionality that's shared for both joined and not joined rooms.

`NotJoinedRoom` is a wrapper around `RoomPreviewInfo` data and a possible local `BaseRoom`, if it exists.

The `RustRoomFactory` cache is now gone since the persistent event cache should have the same effect.

features/roomdirectory/impl/src/test/kotlin/io/element/android/features/roomdirectory/impl/root/RoomDirectoryPresenterTest.kt

@@ -26,7 +26,8 @@ import kotlinx.coroutines.test.advanceUntilIdle
 import kotlinx.coroutines.test.runTest
 import org.junit.Test
 
-@OptIn(ExperimentalCoroutinesApi::class) class RoomDirectoryPresenterTest {
+@OptIn(ExperimentalCoroutinesApi::class)
+class RoomDirectoryPresenterTest {
     @Test
     fun `present - initial state`() = runTest {
         val presenter = createRoomDirectoryPresenter()