feat(electric): Create permissions protobuf definitions and write validation logic

[magnetised]

• [x] VAX-1679
• [ ] Protobuf naming https://github.com/electric-sql/electric/pull/768/files#r1560987046
• [ ] assign id cleanup: https://github.com/electric-sql/electric/pull/768#discussion_r1560994540
• [ ] re-order migrations: https://github.com/electric-sql/electric/pull/947#discussion_r1542087930

[linear[bot]]

VAX-1425 Create permissions protobuf definitions and write validation logic

[msfstef]

created small PR to add ELECTRIC_FEATURES to the client CLI for ease of use https://github.com/electric-sql/electric/pull/1304

draft PR for linearlite multi-project + multi-user stacked on top of this for ad-hoc testing https://github.com/electric-sql/electric/pull/1303

[KyleAMathews]

👋 we've been working the last month on a rebuild of the Electric server over at a temporary repo https://github.com/electric-sql/electric-next/

You can read more about why we made the decision at https://next.electric-sql.com/about

We're really excited about all the new possibilities the new server brings and we hope you'll check it out soon and give us your feedback.

We're now moving the temporary repo back here. As part of that migration we're closing all the old issues and PRs. We really appreciate you taking the time to investigate and create this improvement!