🏡 0.6.6 Rooms as app spaces

All the previous experiments were just a play and now we got a bit more serious. Now everything in the app will be situated inside a SEA pair space. It'll have certificates for everyone to use in all accepted use cases. The root app room is hard-coded and is a starting point of the room network exploration. This opens many interesting use cases and makes data management much more reliable.

All the room navigation is working now, spaces are now working inside rooms - the coordinates are stored inside, not in the user graph. Certified writes are bigger and a bit slower, but it's another level of app credibility and encapsulation.