[skip ci]

* Add a contributing home page

This entry point is intended for quick instruction on how to accomplish
development tasks, and then links out to deeper guides on contributing
from there.

Not sure why I had to add that full path to _category_.json when that wasn't
there before, but this was the only way to make it work locally with ir-docs

* Link to contributing docs from README

* Shorter path

Earlier test failed because IDs are case-sensitive and the casing on the
article didn't match Tour-of-Ignite

---------

Co-authored-by: Frank Calise <fcalise@gmail.com>

# [9.8.0](v9.7.2...v9.8.0) (2024-08-09)

### Features

* **doc:** add repo URL for ir-docs ([#2734](#2734)) ([4f59af8](4f59af8))