feat: Fork octo-fiestarr as allstarr with Jellyfin proxy improvements

Major changes:
- Rename project from octo-fiesta to allstarr
- Add Jellyfin proxy support alongside Subsonic/Navidrome
- Implement fuzzy search with relevance scoring and Levenshtein distance
- Add POST body logging for debugging playback progress issues
- Separate local and external artists in search results
- Add +5 score boost for external results to prioritize larger catalog(probably gonna reverse it)
- Create FuzzyMatcher utility for intelligent search result scoring
- Add ConvertPlaylistToJellyfinItem method for playlist support
- Rename keys folder to apis and update gitignore
- Filter search results by relevance score (>= 40)
- Add Redis caching support with configurable settings
- Update environment configuration with backend selection
- Improve external provider integration (SquidWTF, Deezer, Qobuz)
- Add tests for all services

allstarr/appsettings.json

@@ -0,0 +1,46 @@
+{
+  "Backend": {
+    "Type": "Subsonic"
+  },
+  "Subsonic": {
+    "Url": "https://navidrome.local.bransonb.com",
+    "MusicService": "SquidWTF",
+    "ExplicitFilter": "All",
+    "DownloadMode": "Track",
+    "StorageMode": "Permanent",
+    "CacheDurationHours": 1,
+    "EnableExternalPlaylists": true
+  },
+  "Jellyfin": {
+    "Url": "http://localhost:8096",
+    "ApiKey": "",
+    "UserId": "",
+    "LibraryId": "",
+    "MusicService": "SquidWTF",
+    "ExplicitFilter": "All",
+    "DownloadMode": "Track",
+    "StorageMode": "Permanent",
+    "CacheDurationHours": 1,
+    "EnableExternalPlaylists": true
+  },
+  "Library": {
+    "DownloadPath": "./downloads"
+  },
+  "Qobuz": {
+    "UserAuthToken": "your-qobuz-token",
+    "UserId": "your-qobuz-user-id",
+    "Quality": "FLAC"
+  },
+  "Deezer": {
+    "Arl": "your-deezer-arl-token",
+    "ArlFallback": "",
+    "Quality": "FLAC"
+  },
+  "SquidWTF": {
+    "Quality": "FLAC"
+  },
+  "Redis": {
+    "Enabled": true,
+    "ConnectionString": "localhost:6379"
+  }
+}