Html show doc rendering

[Isaac-Flath]

Improved show_doc rendering for HTML, including rending the documents table as an HTML table. This is useful in order to use show_doc with FastHTML apps.

I cloned every fastai repo and checked for uses of the BasicHTMLRenderer that is being changed, and there were no uses (see result in image).

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[Isaac-Flath]

@jph00 - I am having trouble figuring out what to do about the failed test. It seems to just effect ubuntu python 3.9 and not other version/OS combos. It seems like the tests passed for the nbdev library, but Quarto is running into an error when trying to render the docs in the test docs build on the tutorial.ipynb notebook.

When I tried to research the error it looked like similar errors could be caused by incorrect quarto directives around multi-column layouts, however I don't think that's the case here since I can't find any multi-column directives that would cause this.

[Isaac-Flath]

Closing for debugging, will reopen when resolved

[Isaac-Flath]

Closing in order to create a clean PR with changes