Add Vercel configuration for domain verification

domains/_vercel.rayy.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "deontic",
+        "email": "someofficialuse@gmail.com"
+    },
+    "records": {
+        "TXT": "vc-domain-verify=www.rayy.is-a.dev,73b2f0c5c059125a46e8"
+    }
+}