Fix remote object read-only + remove relations (#4921)

- Set `readOnly` boolean in table row context. Preventing updates and
deletion
- Show page is null for remote objects. No need for complicated design
since this is temporary?
- Relation creations are now behind a feature flag for remote objects
- Refetch objects and views after syncing objects

---------

Co-authored-by: Thomas Trompette <thomast@twenty.com>

packages/twenty-front/src/pages/object-record/RecordShowPage.tsx

@@ -88,6 +88,11 @@ export const RecordShowPage = () => {
         ].join(' ')
       : `${labelIdentifierFieldValue}`;
 
+  // Temporarily since we don't have relations for remote objects yet
+  if (objectMetadataItem.isRemote) {
+    return null;
+  }
+
   return (
     <PageContainer>
       <PageTitle title={pageName} />