feat: Add Frontend-Side YouTube Downloader (v2.0.0)

feat: Add Cobalt API fallback (v1.9.20)

feat: Add Piped API fallback integration (v1.9.19)

fix: Validate Invidious downloads and expand mirror list (v1.9.18)

fix: Resolve subprocess scope issue and prioritize working instance (…

…v1.9.17)

fix: Import subprocess and update Invidious mirrors (v1.9.16)

fix: Enable IPv6 and try iOS client (v1.9.14)

fix: Enable IPv6 and try iOS client (v1.9.14)

fix: Refactor cookie logic and use android_creator client (v1.9.13)

fix: Debug cookie format and try alternative yt-dlp clients (v1.9.12)