Invite list view

Adds a CTA on the room list to view invites if there are any.

The invite list presents each invite with accept/decline buttons
and (for room invites) the sender details.

Fixes #102

features/roomlist/api/src/main/kotlin/io/element/android/features/roomlist/api/RoomListEntryPoint.kt

@@ -34,8 +34,8 @@ interface RoomListEntryPoint : FeatureEntryPoint {
         fun onRoomClicked(roomId: RoomId)
         fun onCreateRoomClicked()
         fun onSettingsClicked()
-
         fun onSessionVerificationClicked()
+        fun onInvitesClicked()
     }
 }