新增只读 Hermes 插件页 (#592)

* feat: add read-only plugins page

* fix: align plugins page i18n and header

packages/server/src/routes/hermes/plugins.ts

@@ -0,0 +1,6 @@
+import Router from '@koa/router'
+import * as ctrl from '../../controllers/hermes/plugins'
+
+export const pluginRoutes = new Router()
+
+pluginRoutes.get('/api/hermes/plugins', ctrl.list)