resolves #94

• review comment related RESTful api + websocket api
• display/delete/resolve/reopen comment thread
• display/edit/delete thread message
• integrate @overleaf/ranges-tracker seed generator function only
• allow to create new comment thread
• toggle/display track changes status

TODO

• track changes interaction
  • create track changes
  • update track changes with insert change
  • update track changes with delete change
  • verify the local changes update correctness
  • provide accept/reject code lens actions
• provide review panel only when range is accessible
• update docs