Add /sitemap.xml (sitemapindex -> wiki) and reference from robots.txt

Author: edtechdev

robots.txt

@@ -52,7 +52,8 @@ Allow: /
 User-agent: Meta-ExternalAgent
 Allow: /
 
-# Site map
+# Site maps
+Sitemap: https://edtechdev.github.io/sitemap.xml
 Sitemap: https://edtechdev.github.io/aied/sitemap-index.xml
 
 # Signals that the site permits AI training, search, and AI input (agent-ready)

sitemap.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+  <sitemap>
+    <loc>https://edtechdev.github.io/aied/sitemap-index.xml</loc>
+  </sitemap>
+</sitemapindex>