v2.0.1 — cookie capture, DASH parsing, CI, vsd

🍪 Cookie Capture\nCookie header captured + passed to all downloaders.\n\n## 📊 DASH MPD Parsing\nAuto-parsed like HLS. Collapsible variant rows.\n\n## 🦀 vsd (Rust) Primary Engine\n27 MB binary. 5ms startup. Fallback: vsd → N_m3u8DL-RE → yt-dlp → ffmpeg.\n\n## 🔬 M3U8 Variants + File Size + Emoji + Batch Grab\n\n## 🔄 Resume + Retry + Notifications\n\n## 🏷 Expanded Types + GitHub CI\nMKV/AVI/MOV/WAV/SRT/VTT/ASS. Auto test+build.