Add Vercel domain configuration for mercier-thomas

domains/_vercel.mercier-thomas.json

@@ -0,0 +1,9 @@
+{
+  "owner": {
+    "username": "tashom11",
+    "email": "241598917+tashom11@users.noreply.github.com"
+  },
+  "records": {
+    "TXT": "vc-domain-verify=mercier-thomas.is-a.dev,55797bee8f591c59b127"
+  }
+}