reuse as much as possible, keep rpc messages close with their rpc,
helper struct for uuid with into() and from(). also replaced the simple
things, such as imports and struct fields
working on this was really hard, so i'm making simple things first.
removed almost everything except bare buffer changes, and not even done
in a smart way, but should be a working PoC? now trying to make a
working client to test it out and actually work on a real prototype
Added a "session" stage, to auth and connect to a Workspace.
Added workspace-level operations (sync, get buffers list...).
Added buffer-level sync operations (push, pull).
