feat: Add cleanup of temporary files in finalize command

- Remove all temporary PNG files after PDF creation
- Remove temporary directory
- Update command feedback messages

pdf_cleaner.py

@@ -120,7 +120,8 @@ def deskew():
 @cli.command()
 @click.argument('output_pdf', type=click.Path())
 def finalize(output_pdf):
-    """Combine processed pages into final PDF."""
+    """Combine processed pages into final PDF and clean up."""
+    temp_dir = ensure_temp_dir()
     temp_files = get_temp_files()
     if not temp_files:
         print("No pages found in temporary directory. Run 'extract' first.")
@@ -132,8 +133,13 @@ def finalize(output_pdf):
     with open(output_pdf, "wb") as f:
         f.write(img2pdf.convert(temp_files))
     
-    print("PDF created successfully!")
-    print("Note: Temporary files were kept for further processing if needed.")
+    # Clean up temporary files
+    print("Cleaning up temporary files...")
+    for file_path in temp_files:
+        os.remove(file_path)
+    os.rmdir(temp_dir)
+    
+    print("PDF created successfully and temporary files removed!")
 
 if __name__ == '__main__':
     cli()