Merge pull request #27347 from lewis6991/fswatch

feat(lsp): add fswatch watchfunc backend

runtime/lua/vim/lsp/client.lua

@@ -815,6 +815,7 @@ function Client:_stop(force)
       rpc.terminate()
       self._graceful_shutdown_failed = true
     end
+    vim.lsp._watchfiles.cancel(self.id)
   end)
 end