[OTHER] Adopt repo-review for tephi

[ESadek-MO]

❓ Other

Adopt and align tephi with repo review, as in cf-units.

Tasks

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1. Adopt repo review, with all checks ignored for the time being (Add repo revew to tephi #164)
2. Decide which standards should be maintained for tephi (below)
3. Implement changes so that tephi is in-line with these standards

Repo Review Errors

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1. PP301 - pytest isn't present in pyproject.toml. (remove the dependancy on setup.cfg and setup.py #177)
2. GH212 - Need to add github groups (Completes the remainder of the code quality work #179)
3. PC170 - Add a pygrep hook (Completes the remainder of the code quality work #179)
4. PC901 - Add custom ci message (via dependabot) (Completes the remainder of the code quality work #179)
5. PP309 - need to add filterwarnings

[trexfeathers]

PC180: - Uses a markdown formatter

FYI we have been forced to ignore this one pretty much everywhere. I believe this is due to temporary limitations of the hardware most SciTools developers work on.