Fix wrong path used by backend (#14352)

After moving a section on the frontend, this broke the path that was
sent by email on the backend.
This kind of error comes back every ~2-3 month under different forms so
we need a more robust solution: I moved routes to the shared folder,
that way we will share one common source of truth between the frontend
and the backend.

Fixes #14343

packages/twenty-front/src/modules/navigation/utils/indexAppPath.ts

@@ -1,4 +1,4 @@
-import { AppPath } from '@/types/AppPath';
+import { AppPath } from 'twenty-shared/types';
 
 const getIndexAppPath = () => {
   return AppPath.Index;