Support additional directives (tabs, grids, citations)

[rowanc1]

There are a number of directives/roles that are possible through the command line mystjs interface (grids, tabs, citations, etc.) that would be good to have in the default jupyterlab experience.

This will likely need a bit of revisiting on the organization of the existing code -- we will keep some running thoughts here as we pull things out for reuse!

• tabs, grids, cards
• citations

[rowanc1]

Tabs/grids/cards are now released in 0.1.3. 🚀

[agoose77]

@rowanc1 I noticed that the grid doesn't seem to be responsive (tested on Binder). Can you reproduce this?

By the way, it is so cool that we have this on main.

[rowanc1]

Citations are starting to be parsed in #88, still need to hook up the transforms properly, that will take a bit more work and we need to know where the bibtex file is!

Regarding responsiveness -- I think we need to do a bunch of work to properly get the styles in. Planning on taking that on separately.

[rowanc1]

Closing this issue in favour of #127, which is specific to the citation work.