Add GitHub Pages challenge configuration file

Co-authored-by: Cursor <cursoragent@cursor.com>

domains/_github-pages-challenge-davidasync.davidasync.json

@@ -0,0 +1,9 @@
+{
+  "owner": {
+    "username": "davidasync",
+    "email": "davidasync@gmail.com"
+  },
+  "records": {
+    "TXT": "9c8d8d2d2ac7481fb7bebe97da4f66"
+  }
+}