feat: Add durable object for Anilist requests (#2)

This commit introduces a durable object to handle Anilist GraphQL requests, with the goal of preventing request duplication.

The durable object is designed to cache responses from the Anilist API, with a TTL based on the `nextAiringEpisode` field in the response.

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>

wrangler.toml

@@ -10,3 +10,11 @@ ENABLE_ANIFY = false
 
 [observability]
 enabled = true
+
+[[durable_objects.bindings]]
+name = "ANILIST_DO"
+class_name = "AnilistDo"
+
+[[migrations]]
+tag = "v1"
+new_classes = ["AnilistDo"]