[WEB-2502] chore: add a loader to the collaborative editor until it has synced with the live server

[aaryan610]

Summary by CodeRabbit

• New Features

  • Introduced a new loading interface for document editing and reading, enhancing user experience during loading times.
  • Added state management for server connection and synchronization status in collaborative editing components.

• Bug Fixes

  • Improved handling of server connection failures and synchronization, providing clearer feedback to users.

• Documentation

  • Updated exports to improve module usability by allowing direct imports from the loader module.