complete refactor

handlers/delete_collection.py

@@ -0,0 +1,9 @@
+from argparse import Namespace
+
+from chroma_functions import delete_collection
+
+
+def handle_delete_collection(args: Namespace) -> int:
+    delete_collection(args.collection)
+    print(f"Deleted collection '{args.collection}'.")
+    return 0