Add Vercel configuration for domain verification

domains/_vercel.heygaurav.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "Gaurav7974",
+        "email": "singhgaurav7974@gmail.com"
+    },
+    "records": {
+        "TXT": "vc-domain-verify=heygaurav.is-a.dev,435d90726b0bfc4de3bc"
+    }
+}