Remove tests/ from repo, update .gitignore, improve ripper

- Remove tests/ directory from version control (added to .gitignore)
- Add .idea/ to .gitignore
- Ripper: CDDB lookup, non-interactive mode, English UI, file renaming
- Config: abcde format mapping, per-format quality options
- CLI: English help texts, new --no-cddb / --pipes / --parallel / --quality options

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.gitignore

@@ -11,6 +11,8 @@ dist/
 *.egg
 
 idea/
+.idea/
+tests/
 testdata/
 CLAUDE.md