docs: add banner to point to new docs domain

Author: thenav56

docs/source/conf.py

@@ -10,6 +10,14 @@
 # import sys
 # sys.path.insert(0, os.path.abspath('.'))
 
+rst_prolog = """
+.. raw:: html
+
+   <div style="background-color: #fff3cd; padding: 12px; border-left: 5px solid #ffa502; margin-bottom: 20px;">
+     ⚠️ This documentation has moved to <a href="https://docs.mapswipe.org/">https://docs.mapswipe.org</a>.
+     Please update your bookmarks.
+   </div>
+"""
 
 # -- Project information -----------------------------------------------------