Add Vercel configuration for domain verification

domains/_vercel.prabh.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "Prabhhx07",
+        "email": "prabhjots2005@gmail.com"
+    },
+    "records": {
+        "TXT": "vc-domain-verify=prabh.is-a.dev,a1b6f5c30838da59ad1e"
+    }
+}