implement local room preview

Signed-off-by: Jason Volk <jason@zemos.net>

src/api/client/room/mod.rs

@@ -1,9 +1,10 @@
 mod aliases;
 mod create;
 mod event;
+mod initial_sync;
 mod upgrade;
 
 pub(crate) use self::{
 	aliases::get_room_aliases_route, create::create_room_route, event::get_room_event_route,
-	upgrade::upgrade_room_route,
+	initial_sync::room_initial_sync_route, upgrade::upgrade_room_route,
 };