GHA: add color output

[mathause]

Should add color to the output on GHA

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 88.80%. Comparing base (9b0b76b) to head (6e36cd6). Report is 90 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #461 +/- ## ========================================== + Coverage 87.90% 88.80% +0.89% ========================================== Files 40 43 +3 Lines 1745 1884 +139 ========================================== + Hits 1534 1673 +139 Misses 211 211 ``` | [Flag](https://app.codecov.io/gh/MESMER-group/mesmer/pull/461/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=MESMER-group) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/MESMER-group/mesmer/pull/461/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=MESMER-group) | `88.80% <ø> (+0.89%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=MESMER-group#carryforward-flags-in-the-pull-request-comment) to find out more.

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[veni-vidi-vici-dormivi]

Uhh that's cool thank you!

[mathause]

No idea :man_shrugging: - I picked it up from xarray

[mathause]

I think it must be not 0. Not sure why keewis went for 3 instead of 1.

• https://force-color.org/
• https://github.com/pydata/xarray/pull/9031
• https://github.com/pytest-dev/pytest/pull/7466