docs: add docs

tests/test_storage.py

@@ -1,13 +1,12 @@
 """Tests for paperlib storage manager."""
 
 import shutil
-import tempfile
 from pathlib import Path
 
 import pytest
 
 from paperlib.config import LibraryPaths
-from paperlib.models import ConversionStatus, PaperMetadata, SourceType
+from paperlib.models import ConversionStatus, SourceType
 from paperlib.storage import PaperStorageManager