Comprehensive release

- New multi-provider architecture under /api/v2/anime

- Added provider modules: animekai, animepahe, animeya, animelok, watchaw, desidub, aniworld, hindidubbed, toonstream, toonworld, techinmind

- Added compatibility stream/proxy routes and proxy balancer status endpoints

- Added docs UI + docs-content + LLM docs routes

- Added endpoint catalog at endpoints.json and /api/v2/docs/endpoints-json

- Updated public UI to match TatakaiAPI style