Add Vercel configuration for domain verification

domains/_vercel.ahmedsultan.json

@@ -0,0 +1,9 @@
+{
+  "owner": {
+    "username": "Ahmedsultan09",
+    "email": "asultan.dev@gmail.com"
+  },
+  "records": {
+    "TXT": "vc-domain-verify=ahmedsultan.is-a.dev,0bf81188718a93b2dbec"
+  }
+}