move presence up two levels out of rooms.edus and rooms.

src/api/client_server/presence.rs

src/api/client_server/profile.rs

src/api/client_server/sync.rs

src/api/server_server.rs

src/database/key_value/mod.rs

src/database/key_value/presence.rs

src/database/key_value/rooms/edus/mod.rs

src/database/key_value/rooms/mod.rs

src/database/mod.rs

src/service/mod.rs

src/service/presence/data.rs

src/service/presence/mod.rs

src/service/rooms/edus/mod.rs

src/service/rooms/mod.rs

src/service/sending/mod.rs