Refactor allowed directories to config.py; implement two-step delete_path with token-based confirmation and pending state; update related models, validation, and error handling

servers/filesystem/config.py

@@ -0,0 +1,7 @@
+import os
+import pathlib
+
+# Constants
+ALLOWED_DIRECTORIES = [
+    str(pathlib.Path(os.path.expanduser("~/")).resolve())
+]  # 👈 Replace with your paths