Add Vercel domain verification configuration

domains/_vercel.sankeer.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "sankeer28",
+        "email": "sankeer28@gmail.com"
+    },
+    "records": {
+        "TXT": "vc-domain-verify=sankeer.is-a.dev,a6b7c11f8c698ff0426f"
+    }
+}