Remove accidentally committed binary and add to .gitignore

Co-authored-by: NeptuneHub <171392533+NeptuneHub@users.noreply.github.com>

Author: Copilot

.gitignore

@@ -18,6 +18,7 @@
 go.work
 
 # Build artifacts
+audiomuse-navidrome-plugin
 bin/
 dist/
 build/