feat: don't let read-only users send their cursors or selections

This was done as it may be used to distract or annoy other users either intentionally or unintentionally.

Signed-off-by: Philip Molares <philip.molares@udo.edu>
Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>

backend/src/realtime/realtime-note/realtime-connection.ts

@@ -52,6 +52,7 @@ export class RealtimeConnection {
       this.user?.username ?? null,
       this.getDisplayName(),
       this,
+      acceptEdits,
     );
   }