Add _vercel.kayan.json for domain verification

domains/_vercel.kayan.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "KayanShah",
+        "email": "hi@kayanshah.com"
+    },
+    "records": {
+        "TXT": "vc-domain-verify=is-a.dev,f57e7a4128ee968d6ac4"
+    }
+}