Introduce core library model

serato_doctor/models/track.py

@@ -0,0 +1,12 @@
+from dataclasses import dataclass
+from pathlib import Path
+
+
+@dataclass(frozen=True)
+class DiskTrack:
+    """An audio file discovered on disk."""
+
+    path: Path
+    filename: str
+    size: int
+    suffix: str