Follow permalinks to and from threads (#5414)

* Implement navigation to event inside a thread when a permalink is used

* Fix permalink navigation in threads to rooms

* Fix navigating to a different thread from a permalink in an existing thread

* Fix tests

* Add missing tests for thread navigation

* Reduce number of diff between ThreadedMessagesNode.kt and MessagesNode.kt

* Navigate back to the room when a link to the current room is clicked in a thread.

---------

Co-authored-by: Benoit Marty <benoitm@element.io>
Co-authored-by: Benoit Marty <benoit@matrix.org>

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/room/BaseRoom.kt

@@ -244,7 +244,9 @@ interface BaseRoom : Closeable {
 
     suspend fun subscribeToCallDecline(notificationEventId: EventId): Flow<UserId>
 
-        /**
+    suspend fun threadRootIdForEvent(eventId: EventId): Result<ThreadId?>
+
+    /**
      * Destroy the room and release all resources associated to it.
      */
     fun destroy()