Display a generic fallback component when initial config load fails (#8588)

Fixes: #8487 #5027 

1. Summary
The purpose of these changes is to elevate the dev/user experience when
the initial config load call fails for whatever reason by displaying a
fallback component.

2. Solution
I ended up making more changes than I initially planned. I had to update
the order of the contexts a bit because `GenericErrorFallback` is
dependent on `AppThemeProvider` for styling and `AppThemeProvider` is
dependent on `ObjectMetadataItemsProvider` for
[`useObjectMetadataItem`](ae2f193d68/packages/twenty-front/src/modules/object-metadata/hooks/useObjectMetadataItem.ts (L22))
hook (`AppThemeProvider` -> `useColorScheme` -> `useUpdateOneRecord` ->
`useObjectMetadataItem`). I had to create a wrapper component for
`AppThemeProvider` and stylize it in a way that it looks responsive on
both mobile and desktop devices. Finally, I had to introduce the
`isErrored` flag to differentiate the loading and error states.

    There are some improvements we can make later - 
    - Display a loading state for the initial config load
    - Implement a refetch logic for the initial config loading failure
    
3. Recording



https://github.com/user-attachments/assets/c2f43573-8006-4118-8e18-8576099d78fd



https://github.com/user-attachments/assets/9c5853d3-539b-4880-aa38-c416c3e13594

---------

Co-authored-by: Félix Malfait <felix@twenty.com>

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

@@ -1,11 +1,21 @@
 import { useRecoilValue } from 'recoil';
 
-import { isClientConfigLoadedState } from '@/client-config/states/isClientConfigLoadedState';
+import { clientConfigApiStatusState } from '@/client-config/states/clientConfigApiStatusState';
+import { ClientConfigError } from '@/error-handler/components/ClientConfigError';
 
 export const ClientConfigProvider: React.FC<React.PropsWithChildren> = ({
   children,
 }) => {
-  const isClientConfigLoaded = useRecoilValue(isClientConfigLoadedState);
+  const { isLoaded, isErrored, error } = useRecoilValue(
+    clientConfigApiStatusState,
+  );
 
-  return isClientConfigLoaded ? <>{children}</> : <></>;
+  // TODO: Implement a better loading strategy
+  if (!isLoaded) return null;
+
+  return isErrored && error instanceof Error ? (
+    <ClientConfigError error={error} />
+  ) : (
+    children
+  );
 };