Add Vercel configuration for domain verification

domains/_vercel.quarkapps.json

@@ -0,0 +1,9 @@
+{
+  "owner": {
+    "username": "Filliall",
+    "email": "asupernova.2023@gmail.com"
+  },
+  "records": {
+    "TXT": "vc-domain-verify=quarkapps.is-a.dev,c67f4868c9c23ef51b4a"
+  }
+}