Add Vercel configuration for domain verification

domains/_vercel.stephenhaleem.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "stephenhaleem",
+        "email": "obilanaeniola01@gmail.com"
+    },
+    "records": {
+        "TXT": ["vc-domain-verify=stephenhaleem.is-a.dev,b20866d9d6ae3e23da43"]
+    }
+}