Shadow-cljs repl started from deps.edn repl is not usable without workarounds

[hukka]

Steps to reproduce:

1. git clone https://github.com/fulcro-community/fulcro-exercises.git and open the project in Calva
2. Jack in, selecting deps.edn and the :serve alias
3. Manually promote the repl by running (shadow/repl :main)
4. a) Try to evaluate the src/holyjak/fulcro_exercises.cljs file, or b) evaluate a single form from the file

Evaluation of the file gives a popup with error `Running the contributed command: 'calva.loadFile' failed.' Evaluating a single sexp doesn't do anything. The repl type in the repl is shown as 'cljc/clj' and the repl type in the file is shown as 'clj'.

Workaround:
After the first three steps, manually reconnect the repl (ctrl-alt-c ctrl-alt-c), this time selecting the shadow-cljs repl type. Now the repl's type in the bottom bar is 'cljc/cljs' and in the file 'cljs', and evaluation works.

What also doesn't work:
Trying to jack in directly to the shadow-cljs repl. Calva tries to launch it with npx, but the project isn't set up for it.

Ideas:
The project has been set up like https://shadow-cljs.github.io/docs/UsersGuide.html#deps-edn, but there is no support from calva for a shadow repl that is not started with the JS version of shadow-cljs itself. I suppose some kind of new option ("shadow-cljs via deps.edn" perhaps, or "shadow-cljs via clj") for this would need to be added, with the current shadow-cljs repl type renamed to "shadow-cljs via npx" for clarity.

Other option would be to have a way to tell calva what a repl's type is, overriding any automatic logic.

[bpringe]

Calva had a shadow-cljs + deps.edn jack-in option until recently. See #1253. Let's see what @PEZ thinks about this issue.

If shadow is configured to use deps.edn than the shadow-cljs project type should be used.

Do we need to update the shadow-cljs configuration to work with deps.edn?