Add Vercel verification for karthikv.is-a.dev

domains/_vercel.karthikv.json

@@ -0,0 +1,9 @@
+{
+  "owner": {
+    "username": "Karthik2509-git",
+    "email": "karthikvanapalli08@gmail.com"
+  },
+  "records": {
+    "TXT": "vc-domain-verify=karthikv.is-a.dev,4faf19019855cbd06804"
+  }
+}