Add _vercel.cauz.json for domain verification

domains/_vercel.cauz.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "Ur-cauz",
+        "email": "urcauzz@gmail.com"
+    },
+    "records": {
+        "TXT": ["vc-domain-verify=cauz.is-a.dev,32723470289f6f5048b8"]
+    }
+}