Add support for comment provider disqusJS

[ShadowySpirits]

Is your feature request related to a problem? Please describe. Disqus blocked in some internet censorship countries. So it is necessary to support the basic mode of disqus that can read reviews in Internet censorship countries.

Describe the solution you'd like SukkaW/DisqusJS implements this basic mode well. I integrated disqusJS into stack as a comment provider. If you consider accepting this proposal, I am willing to submit a pr.

screenshot: light mode:

dark mode:

[ShadowySpirits]

PS. disqusJS can detect whether disqus can be accessed to automatically switch between normal mode and basic mode.

demo: https://blog.lv5.moe/p/nginx-ssl-tls-configuration-optimization/

[CaiJimmy]

👍 Looks good to me. PR is welcome.