Flag up development tut as a stub

Author: hyanwong

development.md

@@ -1,4 +1,20 @@
-# Development
+---
+jupytext:
+  text_representation:
+    extension: .md
+    format_name: myst
+    format_version: 0.12
+    jupytext_version: 1.9.1
+kernelspec:
+  display_name: Python 3
+  language: python
+  name: python3
+---
+
+(sec_development)=
+
+# _Development_
+% remove underscores in title when tutorial is complete or near-complete
 
 :::{note}
 Add content for helping developers to add more tutorials.