adds pep-0723 script to enable localdev `uv run ./manage.py runserver…

…` without venv.

manage.py

@@ -1,3 +1,16 @@
+## <https://peps.python.org/pep-0723/> recently adopted python standard.
+## Allows, for development, to run the app via `uv run ./manage.py runserver`, with no venv.
+# /// script
+# requires-python = "~=3.8.0"
+# dependencies = [
+#     "django~=4.2.0",
+#     "python-dotenv~=1.0.0",
+#     "requests~=2.27.0",
+#     "trio~=0.26.0",
+#     "urllib3~=1.26.0",
+# ]
+# ///
+
 #!/usr/bin/env python
 """Django's command-line utility for administrative tasks."""
 import os