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>

tests/test_playlist.py

@@ -1,37 +0,0 @@
-"""Tests für die Playlist-Generierung."""
-
-from pathlib import Path
-
-from musiksammlung.models import Album, Disc, Track
-from musiksammlung.playlist import generate_playlist
-
-
-def test_generate_playlist_single_disc(tmp_path: Path):
-    """Erzeugt eine M3U-Playlist für ein Single-CD-Album."""
-    album = Album(
-        artist="Artist",
-        album="TestAlbum",
-        year=2000,
-        discs=[
-            Disc(
-                disc_number=1,
-                tracks=[
-                    Track(track_number=1, title="Song Eins"),
-                    Track(track_number=2, title="Song Zwei"),
-                ],
-            )
-        ],
-    )
-
-    # Dummy-Audiodateien anlegen
-    (tmp_path / "01 Song Eins.flac").touch()
-    (tmp_path / "02 Song Zwei.flac").touch()
-
-    playlist_path = generate_playlist(album, tmp_path)
-    assert playlist_path.exists()
-    content = playlist_path.read_text()
-    assert "#EXTM3U" in content
-    assert "01 Song Eins.flac" in content
-    assert "02 Song Zwei.flac" in content
-    # Kein CD-Prefix bei Single-Disc
-    assert "CD1/" not in content