Organizing Helpers list

[brentru]

This is an initial pass at organizing the helper library list within drivers.rst into specific helper library categories.

Suggestions and improvements are appreciated.

[kattni]

Thanks for doing this! One suggestion to consider below.

[kattni]

Excellent, thank you for the updates. Feel free to merge when passing.

[brentru]

@kattni thx - I think we could have explanations about each category, similar to drivers..but we might be able to omit this if our categories are self-explanatory enough?

[kattni]

@brentru If we're going to put in explanations for any of them, we should put them in for all of them, regardless of how self-explanatory they are. I do agree this might be a good idea. One sentence explaining the category may be useful.

[brentru]

@kattni I added per-helper category descriptions in the latest commit.

[kattni]

You'll have to look up formatting, but please format the category titles as some sort of sub-header or bold of some sort. At the moment, it's difficult to read.

[brentru]

@kattni Added appropriate header level formatting.

(also, TIL about the sphinx style guide... https://documentation-style-guide-sphinx.readthedocs.io/en/latest/style-guide.html#headings)

[kattni]

Looks great! Thank you for doing this!

[kattni]

@brentru Sphinx failed with a styling error. Feel free to merge once everything is passing.