Create edit dashboard action (#14564)

Closes https://github.com/twentyhq/core-team-issues/issues/1435

Introduced a new pattern to force to register an action or not.
Discussed this with @charlesBochet

packages/twenty-front/src/modules/page-layout/utils/isPageLayoutEmpty.ts

@@ -0,0 +1,7 @@
+import { type PageLayoutWithData } from '~/modules/page-layout/types/pageLayoutTypes';
+
+export const isPageLayoutEmpty = (pageLayout: PageLayoutWithData): boolean => {
+  return (
+    pageLayout.tabs.length === 1 && pageLayout.tabs[0].widgets.length === 0
+  );
+};