Add Vercel configuration for domain verification

domains/_vercel.toshal.json

@@ -0,0 +1,9 @@
+{
+  "owner": {
+    "username": "toshuuu",
+    "email": "toshalkirange8@gmail.com"
+  },
+  "records": {
+    "TXT": "vc-domain-verify=toshal.is-a.dev,cc361ae9bb6067df6137"
+  }
+}