Add CNAME for sudarshanmehta.is-a.dev custom domain

Point sudarshanmehta.github.io to sudarshanmehta.is-a.dev via CNAME record.

domains/sudarshanmehta.json

@@ -0,0 +1,9 @@
+{
+  "owner": {
+    "username": "sudarshanmehta",
+    "email": "sudarshan.mehtacs@gmail.com"
+  },
+  "record": {
+    "CNAME": "sudarshanmehta.github.io"
+  }
+}