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

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

packages/twenty-front/src/pages/settings/data-model/SettingsObjectNewField/SettingsObjectNewFieldStep1.tsx

@@ -140,6 +140,7 @@ export const SettingsObjectNewFieldStep1 = () => {
                   <SettingsObjectFieldItemTableRow
                     key={activeMetadataField.id}
                     fieldMetadataItem={activeMetadataField}
+                    isRemoteObjectField={activeObjectMetadataItem.isRemote}
                     ActionIcon={
                       isLabelIdentifierField({
                         fieldMetadataItem: activeMetadataField,