Import existing LinTunes project

Snapshot of the existing codebase before working through the TASKS.md
backlog. Real library data (data/) and the iTunes import fixture
(itunes-test-library/) are gitignored.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,20 @@
+# Python
+__pycache__/
+*.pyc
+.pytest_cache/
+
+# Editor backups
+*~
+
+# Atomic-write temp files
+*.json.tmp
+
+# Trav's real library data (lives in the music folder; moves to the tummult drive)
+data/
+
+# iTunes library exports used only for the manual real-import eyeball task
+# (~104M of real library metadata; the test suite builds its own small fixtures)
+itunes-test-library/
+
+# Local-only Claude settings
+.claude/settings.local.json