chore: Quick refactor to usePolicy hook (#3161)

app/hooks/usePolicy.ts

@@ -0,0 +1,12 @@
+import useStores from "./useStores";
+
+/**
+ * Quick access to retrieve the abilities of a policy for a given entity
+ *
+ * @param entityId The entity id
+ * @returns The available abilities
+ */
+export default function usePolicy(entityId: string) {
+  const { policies } = useStores();
+  return policies.abilities(entityId);
+}