Fixes #978 - Message forwarding support

* Add support for message forwarding

* Move the TimelineProvider within the RoomProxy to avoid it going out of sync and have it automatically register for timeline updates on init

* Implement single selection form button style for message forwarding

* Add searching and filter out the source room from the list

* Fixed emoji screen initial search bar height

* Add view models tests

* Add changelog

* Update strings

* Tweaks following code review

ElementX/Sources/Screens/HomeScreen/View/HomeScreenRoomCell.swift

@@ -53,7 +53,7 @@ struct HomeScreenRoomCell: View {
         .accessibilityIdentifier(A11yIdentifiers.homeScreen.roomName(room.name))
     }
     
-    @ViewBuilder
+    @ViewBuilder @MainActor
     var avatar: some View {
         if dynamicTypeSize < .accessibility3 {
             LoadableAvatarImage(url: room.avatarURL,