feat(anime): add anime browser powered by Aniyomi extensions

- Add `subminer anime` / `--anime` and a tray entry to open a browser that searches installed Aniyomi extension sources, shows cover art and episodes, and plays into mpv with overlay/mining attached
- Add an Extensions tab to add repos and install/update/remove sources, and per-source settings for sources needing config
- Support searching all sources at once with streaming, per-source results and status
- Prefer Japanese audio/subtitle tracks from the source and keep the primary subtitle slot reserved for Japanese
- Fix window/tray/Dock handling so the browser and mpv can be switched between without quitting the app or losing the Dock icon
- Add anime.repos, anime.extensionsDir, anime.preferredQuality config keys (no bundled repos or discovery)

src/config/definitions.ts

@@ -39,6 +39,7 @@ const {
 } = CORE_DEFAULT_CONFIG;
 const {
   ankiConnect,
+  anime,
   jimaku,
   tsukihime,
   anilist,
@@ -72,6 +73,7 @@ export const DEFAULT_CONFIG: ResolvedConfig = {
   subtitleStyle,
   subtitleSidebar,
   auto_start_overlay,
+  anime,
   jimaku,
   tsukihime,
   anilist,