feat: add Vercel domain configuration

domains/_vercel.ragoon.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "ragoon99",
+        "email": "psychodragoon99@gmail.com"
+    },
+    "records": {
+        "TXT": "vc-domain-verify=ragoon.is-a.dev,42bd723530c24d01197c"
+    }
+}