* Update contributing guide
In this change, I tried to simplify the language of the contributing
guide to make it more accessible and less wordy.
I also updated the information in a few places and fixed a couple of
typos.
* Remove table of contents
Since moving this doc to the docs site, our theme generates a ToC
automatically, hardcoding this one is redundant.
* Move the contributing guides
* Update maintainer documentation
This chnage updates the maintainers guide to include information on PR
reviews, deployments, and CI.
Housing this documentation here increases transparency with our
community.
* Edit with PR feedback
* Edit based on PR feedback
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