feat: initial project setup for AniKatoAPI

- Express.js server with Vercel deployment support
- Complete API endpoints for anikototv.to anime data
- Home, search, info, episodes, stream, schedule endpoints
- Category filtering and genre support
- Caching system with 5-minute TTL
- CORS configuration
- Public documentation page
- Docker and Render deployment configs
- MIT License

src/helper/cache.helper.js

@@ -0,0 +1,21 @@
+const cache = new Map();
+const CACHE_TTL = 5 * 60 * 1000;
+
+const getCache = (key) => {
+  const item = cache.get(key);
+  if (item && Date.now() - item.timestamp < CACHE_TTL) {
+    return item.data;
+  }
+  cache.delete(key);
+  return null;
+};
+
+const setCache = (key, data) => {
+  cache.set(key, { data, timestamp: Date.now() });
+};
+
+const clearCache = () => {
+  cache.clear();
+};
+
+export { getCache, setCache, clearCache };