move typing feature up one level out of rooms.edus.

src/api/client_server/sync.rs

src/api/client_server/typing.rs

src/api/server_server.rs

src/database/key_value/globals.rs

src/service/mod.rs

src/service/rooms/edus/mod.rs

src/service/rooms/mod.rs

src/service/rooms/typing/mod.rs