add _vercel.ahmadkhan.json for Vercel domain verification

domains/_vercel.ahmadkhan.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "Ahmedkhn143",
+        "email": "ahmadkha8143@gmail.com"
+    },
+    "records": {
+        "TXT": "vc-domain-verify=ahmadkhan.is-a.dev,6f8f4c5d687cb27b984c"
+    }
+}