Add support for pluto

[Dsantra92]

Hi @johnnychen94, I did some work on the Pluto notebook. Sorry, it took so long. Currently, it supports rendering a pluto notebook using PlutoStaticHTML. I am concerned with adding a title and other badges to the rendered notebook.

However, parsing metadata won't be similar to Julia or markdown's. Pluto.jl has full control over a notebook's start and end content, so we might need to create special parse for Pluto that can parse metadata from the file allowing multiline regex matching. I need some advice as to whether I should go ahead with this approach.

[johnnychen94]

@Dsantra92 Great! I'll check this PR this weekend and see if there's anything I can do to quickly get this in.

[johnnychen94]

Sorry, it's a busy weekend, I'll manage to get some time for this PR ASAP

[johnnychen94]

@Dsantra92 I failed to manage some time doing this (busy work, busy life); really sorry about this!

I didn't check it locally, but the overall changes look okay to me. I just sent you an write invitation to this package so if you're confident, you're free to merge this and add any wanted feature (and potential bug fixes 😆 ).

[Dsantra92]

This pr isn't complete yet. I will merge when it's completed.

[Dsantra92]

This is good to go as a beta feature. Example here. It will be complete with docs and some tests for edge cases ( I cannot add time for it this week).
So should I merge this and open issues for docs and tests? @johnnychen94.

[johnnychen94]

You make the decision

[johnnychen94]

as long as there's a commitment, it's all okay to me

[Dsantra92]

I think I can make the docs and basic tests work within the coming weeks. Let's merge this as a beta feature now.

[CarloLucibello]

Julia v1.0 is not supported by PlutoStaticHTML, we should update the julia version bound of DemoCards.jl to julia v1.6.

Not clear why windows test on latest julia are failing

[Dsantra92]

Thanks for the review @CarloLucibello, will get the changes done asap.

[Dsantra92]

Hi @CarloLucibello the changes you suggested to src/types/pluto.jl makes sense but I then the functions and doc style will differ from the exisiting markdown and julia files. Just wanted to make these things uniform across the different types.

[CarloLucibello]

ok, let's relax to AbstractString and merge and tag quickly then.

[Dsantra92]

There should be a minor version bump?

[CarloLucibello]

No breaking changes, so bump to 0.4.10

[Dsantra92]

I went to bump and release myself. Hope it's okay.