fix tikz demo

[fkastner]

This should fix the tikz demo.
But I commented out a part of the newest demo which, I think, breaks the later demos.

[tlienart]

Thanks, yeah I had tried Tectonic but it's not completely portable as per this issue:

(...)
Cannot locate artifact 'tectonic_bin' for aarch64-apple-darwin-libgfortran5-cxx11-julia_version+1.8.4 ...
(...)

I'll investigate the table one though and probably do the reverse; the table one should be fixable and added back, and the Tikz one should probably just be removed for now.

[fkastner]

Another idea would be to migrate TikzPictures.jl to the tectonic.jll which nowadays seems to have good support.

Also: if the demo works on Github Pages then it's a valid demo for many people (those not with an M1 Mac). In my opinion, that still makes it very useful.

[tlienart]

I agree with this; what we can do is just add a condition based on the system type so that it doesn't break on my machine.

[fkastner]

Does this now work for you?

[tlienart]

yes if you add an else clause that defines the environment in utils.jl

else
    env_tikzcd(_, _) = ""
end

thanks!

(PS: can you rebase on master as nightly is dropped from CI for now, thanks!)

[fkastner]

Ok, this should be good now.