ANSI colored output in captured stdout

[fonsp]

Originally posted by @diegozea in #894 (comment)

I found this while using programs designed for the terminal, distributed in the Julia ecosystem as jll packages. For example:

# ╔═╡ 4c4d8eaa-87ae-4f2b-8f33-4cced2cc824c
using FastME_jll

# ╔═╡ 0505615f-bf25-4316-923e-eb4dcef34129
fastme() do _fastme
	run(`$_fastme -h`)
end

Here the problem is not only color code but also bold character and other things I have no idea about:
Pluto:

Terminal:

[fonsp]

This is different from #894 because stdout/stderr is captured and displayed as a log. This should be relatively easy to implement, take a look at how we use AnsiUp in https://github.com/fonsp/Pluto.jl/blob/v0.19.5/frontend/components/PkgTerminalView.js .

[fonsp]

@HirumalPriyashan maybe? ☺️

[diegozea]

Thanks! It works perfectly now 😃