Results 35 issues of Federico Ruggi

Fix #4994 **Problem:** As discussed [here](https://github.com/concrete-utopia/utopia/pull/4929#discussion_r1512949454) we need a way to apply middlewares to the Remix API routes. **Fix:** This PR adds the `Chain` concept to the current handling logic....

⚠️ DO NOT MERGE ⚠️

Followup to https://github.com/concrete-utopia/utopia/pull/4946 This PR removes the collaborators from the Liveblocks storage so we only rely on the Utopia DB. **⚠️ DO NOT MERGE UNTIL THE BFF IS ENABLED ⚠️**

**Problem:** Describe the problem being addressed as succinctly as possible. **Fix:** Describe the fix you have made as succinctly as possible. **Commit Details:** (< vv pls delete this section if's...