chore: add _github-pages-challenge-MuizU.json for domain verification

This commit adds a new JSON file required for GitHub Pages domain verification. The file includes the necessary TXT record to verify ownership of the domain.

domains/_github-pages-challenge-MuizU.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "muizu",
+        "email": "muizuvais99@gmail.com"
+    },
+    "record": {
+        "TXT": "8cf896945b34d5309a335f41eb2000"
+    }
+}