feat: enhance creation of recommendation keywords

lib/recommendation.ts

@@ -51,3 +51,10 @@ export async function createRecommendationResource(
 
   cache.set(cacheId, JSON.stringify(resource));
 }
+
+export async function getAllRecommendations() {
+  const keys = await cache.keys("recommendations:movie:*");
+  return Promise.all(keys.map((k) => cache.get(k))).then((res) =>
+    res.map((r) => JSON.parse(r))
+  );
+}