Init function blocked by kaleido

[Grobycn]

When using PlotlyJS, it get stuck.

Run .julia/artifacts/eaf6781d8951eda81e75724d9c53b719e680ff30/kaleido/kaleido plotly --disable-gpu works fine and output:

[0915/194811.964419:WARNING:resource_bundle.cc(435)] locale_file_path.empty() for locale
[0915/194811.996039:WARNING:resource_bundle.cc(435)] locale_file_path.empty() for locale
[0915/194812.006628:WARNING:resource_bundle.cc(435)] locale_file_path.empty() for locale
{"code": 0, "message": "Success", "result": null, "version": "0.0.3"}
[0915/194812.079053:WARNING:resource_bundle.cc(435)] locale_file_path.empty() for locale

But PlotlyBase._start_kaleido_process() blocked at line 48: res = readline(P.stdout)

I think it's better to start kaleido when needed.

[thchr]

I think this is also causing hangs on CI, e.g., https://github.com/thchr/Brillouin.jl/actions/runs/4795212583/jobs/9044116886#step:6:238.

From a Slack conversation in pkg-usage (copied over here), this seems to be related to this part of the _start_kaleido_process() which does not seem to exit the process. This causes Julia to hang, waiting for the process to finish, stalling precompilation at that point.

It seems like this issue could potentially be causing consistent CI-failures for any non-Windows dependency of PlotlyJS.jl on Julia master?

[disberd]

This should be solved now. See the related comment in #473 (comment) for more details