Create _vercel.kartik.json

Add Vercel TXT verification record for kartik.is-a.dev

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

domains/_vercel.kartik.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "KartikGupta2007",
+        "email": "k.a.r.t.i.k.2007.17@gmail.com"
+    },
+    "records": {
+        "TXT": "vc-domain-verify=kartik.is-a.dev,59bfa86b5fc38252924f"
+    }
+}