Setting up a ClojureScript development environment - Visual Studio Code

[PEZ]

I am trying to lower the thresholds of setting up a Clojurescript development environment with an extension to VS Code I call Calva. I could write a first version of an Appendix B section about Calva, if you like. It's pretty easy with Calva, since it is mainly about installing the extension and, in case of shadow-cljs include a dependency on cider/nrepl. Similar to this: https://shadow-cljs.github.io/docs/UsersGuide.html#_calva_vs_code

Let me know if you want me to issue a PR.