feat(anime): support shared bridge installs and updates

- Prefer configured or package-managed bridge bundles before downloading
- Select compatible upstream releases and offer managed-bundle updates
- Document bridge configuration and package dependencies

packaging/aur/subminer-bin/PKGBUILD

@@ -27,6 +27,7 @@ optdepends=(
 	'python-guessit: improved AniSkip title and episode inference'
 	'alass-git: preferred subtitle synchronization engine'
 	'python-ffsubsync: fallback subtitle synchronization engine'
+	'mangatan-extension-server: anime browser bridge shared with Mangatan; skips the bundle download and is updated by pacman'
 )
 provides=("subminer=${pkgver}")
 conflicts=('subminer')