feat(tmdb): language fallback chain, rich details and per-episode season fetch (MD-1)

Co-Authored-By: Claude Opus 5.5 <[email protected]>

packages/adapters/src/tmdb/index.ts

@@ -1,3 +1,5 @@
 export { RequestLimiter, TtlLruCache } from "./cache.ts";
 export * from "./client.ts";
+export * from "./details.ts";
 export * from "./match.ts";
+export * from "./translations.ts";