feat(route): add dlnews (#12997)

* feat(route):add DLNEWS

* clean up

* use embedded JSON

* fix: docusaurus style md

* add description.art and rate limit

* increase the concurency

* fix: fix radar docs link

* docs: move to finance

---------

lib/v2/dlnews/router.js

@@ -0,0 +1,3 @@
+module.exports = (router) => {
+    router.get('/:category?', require('./category'));
+};