Add Vercel configuration for domain verification

domains/_vercel.prakhar.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "Prakhar-commits",
+        "email": "prakharb56@gmail.com"
+    },
+    "records": {
+        "TXT": "vc-domain-verify=prakhar.is-a.dev,4f291bb25595cae5cda2"
+    }
+}