Improve AppError boundaries (#11107)

## What

This PR aims to make sure all application exceptions are captured
through react-error-boundaries

Once merged we will have:
- Root Level: AppErrorBoundary at the highest level (full screen) ==>
this one needs to be working in any case, not relying on Theme, was not
working
- Route Level: AppErrorBoundary in DefaultLayout (full screen) ==> this
was missing and it seems that error are not propagated outside of the
router, making errors triggered in CommandMenu or NavigationDrawer
missing
- Page Level: AppErrorBoundary in DefaultLayout write around the Page
itself (lower than CommandMenu + NavigationDrawer)
- Manually triggered: example in ClientConfigProvider

## Screenshots

App level (ex throw in IconsProvider)
<img width="1512" alt="image"
src="https://github.com/user-attachments/assets/18a14815-a203-4edf-b931-43068c3436ec"
/>

Route level (ex throw in CommandMenu)
<img width="1512" alt="image"
src="https://github.com/user-attachments/assets/ca066627-14c7-438e-a432-f0999a1f3b84"
/>

Page level (ex throw in RecordTable)
<img width="1512" alt="image"
src="https://github.com/user-attachments/assets/ffeaa935-02af-4762-8859-7a0ccf8b77e1"
/>

Manually Triggered (clientConfig, ex when backend is not up)
<img width="1512" alt="image"
src="https://github.com/user-attachments/assets/062d6d84-097a-4ed9-b6ce-763b8c27c659"
/>

packages/twenty-front/src/modules/client-config/components/ClientConfigProvider.tsx

@@ -1,7 +1,7 @@
 import { useRecoilValue } from 'recoil';
 
 import { clientConfigApiStatusState } from '@/client-config/states/clientConfigApiStatusState';
-import { ClientConfigError } from '@/error-handler/components/ClientConfigError';
+import { AppFullScreenErrorFallback } from '@/error-handler/components/AppFullScreenErrorFallback';
 
 export const ClientConfigProvider: React.FC<React.PropsWithChildren> = ({
   children,
@@ -14,7 +14,13 @@ export const ClientConfigProvider: React.FC<React.PropsWithChildren> = ({
   if (!isLoaded) return null;
 
   return isErrored && error instanceof Error ? (
-    <ClientConfigError error={error} />
+    <AppFullScreenErrorFallback
+      error={error}
+      resetErrorBoundary={() => {
+        window.location.reload();
+      }}
+      title="Unable to Reach Back-end"
+    />
   ) : (
     children
   );