Rework relations (#3431)

* Rework relations

* Fix tests

packages/twenty-front/src/modules/object-metadata/utils/isObjectMetadataAvailableForRelation.ts

@@ -0,0 +1,11 @@
+import { CoreObjectNameSingular } from '@/object-metadata/types/CoreObjectNameSingular';
+import { ObjectMetadataItem } from '@/object-metadata/types/ObjectMetadataItem';
+
+export const isObjectMetadataAvailableForRelation = (
+  objectMetadataItem: Pick<ObjectMetadataItem, 'isSystem' | 'nameSingular'>,
+) => {
+  return (
+    !objectMetadataItem.isSystem ||
+    objectMetadataItem.nameSingular === CoreObjectNameSingular.WorkspaceMember
+  );
+};

packages/twenty-front/src/modules/object-metadata/utils/isStandardObject.ts

@@ -1,11 +0,0 @@
-import { StandardObjectNameSingular } from '@/object-metadata/types/StandardObjectNameSingular';
-
-export const isStandardObject = (objectNameSingular: string) => {
-  const standardObjectNames = [
-    StandardObjectNameSingular.Company,
-    StandardObjectNameSingular.Person,
-    StandardObjectNameSingular.Opportunity,
-  ] as string[];
-
-  return standardObjectNames.includes(objectNameSingular);
-};