Add Vercel configuration for domain verification

domains/domains/_vercel.ryuma.json

@@ -0,0 +1,9 @@
+{
+  "owner": {
+    "username": "ryuma69",
+    "email": "omarshaik247@gmail.com"
+  },
+  "record": {
+    "TXT": "vc-domain-verify=ryuma.is-a.dev,458bbbf1f00e08750c55"
+  }
+}