FRE-600: Fix code review blockers

- Consolidated duplicate UndoManagers to single instance
- Fixed connection promise to only resolve on 'connected' status
- Fixed WebSocketProvider import (WebsocketProvider)
- Added proper doc.destroy() cleanup
- Renamed isPresenceInitialized property to avoid conflict

Co-Authored-By: Paperclip <noreply@paperclip.ing>

node_modules/uuid/CONTRIBUTING.md

@@ -0,0 +1,18 @@
+# Contributing
+
+Please feel free to file GitHub Issues or propose Pull Requests. We're always happy to discuss improvements to this library!
+
+## Testing
+
+```shell
+npm test
+```
+
+## Releasing
+
+Releases are supposed to be done from master, version bumping is automated through [`standard-version`](https://github.com/conventional-changelog/standard-version):
+
+```shell
+npm run release -- --dry-run  # verify output manually
+npm run release               # follow the instructions from the output of this command
+```