refactor(onboarding): restructure onboarding routes and components

- Removed obsolete onboarding routes: complete, create-complex, index, verify-email, and verify.
- Introduced new setup stepper page for onboarding process.
- Created a multi-step setup component to handle complex creation with validation.
- Added new schemas for complex creation and plan features.
- Implemented detailed steps for complex name, location, plan selection, and court setup.
- Enhanced error handling and user feedback during the onboarding process.

apps/frontend/src/routes/auth-callback.tsx

@@ -17,23 +17,9 @@ function AuthCallbackPage() {
 
       try {
         await acceptStoredPendingInvite(apiClient.complexes.acceptPendingInvitations);
-        const complexes = await apiClient.complexes.listMine();
-
-        if (complexes.length === 1) {
-          await apiClient.complexes.select({ complexId: complexes[0].id });
-          navigate({ to: '/' });
-        } else if (complexes.length > 1) {
-          const current = await apiClient.complexes.getCurrent();
-          if (current) {
-            navigate({ to: '/' });
-          } else {
-            navigate({ to: '/select-complex' });
-          }
-        } else {
-          navigate({ to: '/onboard/create-complex' });
-        }
+        navigate({ to: '/' });
       } catch {
-        navigate({ to: '/onboard' });
+        navigate({ to: '/login' });
       }
     }