fix(lsp): use vim.notify for all message types #34489

Problem: Currently, vim.notify is only used to display messages when the
message type is Error.

Solution: Use vim.notify to display messages for all message types.

runtime/lua/vim/lsp/handlers.lua

@@ -588,12 +588,8 @@ NSC['window/showMessage'] = function(_, params, ctx)
   if not client then
     err_message('LSP[', client_name, '] client has shut down after sending ', message)
   end
-  if message_type == protocol.MessageType.Error then
-    err_message('LSP[', client_name, '] ', message)
-  else
-    message = ('LSP[%s][%s] %s\n'):format(client_name, protocol.MessageType[message_type], message)
-    api.nvim_echo({ { message } }, true, {})
-  end
+  message = ('LSP[%s] %s'):format(client_name, message)
+  vim.notify(message, log._from_lsp_level(message_type))
   return params
 end