Support `vendor script` precompile in `JH`

Summary

We need to add some vendor scripts in JH, similar to: https://jihulab.com/gitlab-cn/gitlab/-/blob/b544851c18777233d0eac67e255b6efac2cee1c8/vendor/assets/javascripts/snowplow/sp.js

Proposal

Add jh/vendor/javascript to the asset path to precompile.