Add Vercel domain verification JSON configuration

domains/_vercel.hello.json

@@ -0,0 +1,9 @@
+{
+    "owner": {
+        "username": "07734maxime",
+        "email": "07734maxime@proton.me"
+    },
+    "records": {
+        "TXT": "vc-domain-verify=hello.is-a.dev,b69eb13a9cba0fc724d2"
+    }
+}