Pinned Messages (#2081)

* add pinned room events hook

* room pinned message - WIP

* add room event hook

* fetch pinned messages before displaying

* use react-query in room event hook

* disable staleTime and gc to 1 hour in room event hook

* use room event hook in reply component

* render pinned messages

* add option to pin/unpin messages

* remove message base from message placeholders and add variant

* display message placeholder while loading pinned messages

* render pinned event error

* show no pinned message placeholder

* fix message placeholder flickering

src/app/features/room/room-pin-menu/index.ts

@@ -0,0 +1 @@
+export * from './RoomPinMenu';