Add Navidrome Scrobbled scrobbler plugin

A Python Extism plugin for Navidrome that scrobbles playback to a
self-hosted Scrobbled (Last.fm-compatible) server, plus Gitea Actions
CI that lints, tests, builds/validates, and publishes the .ndp
artifact to pkgs.daubney.dev.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018n5ffHCn5QUjpDtuWTk3fh

.gitignore

@@ -0,0 +1,10 @@
+*.wasm
+*.ndp
+dist/
+scratch/
+__pycache__/
+*.pyc
+.venv/
+.idea/
+.junie/
+.DS_Store