CI/CD refactor

[codecov-commenter]

Codecov Report

Attention: 16 lines in your changes are missing coverage. Please review.

Comparison is base (6a15080) 86.43% compared to head (b6c86fb) 62.62%.

Files	Patch %	Lines
src/ridgeplot/_testing.py	65.51%	10 Missing :warning:
src/ridgeplot/_kde.py	66.66%	1 Missing and 2 partials :warning:
src/ridgeplot/_missing.py	87.50%	1 Missing and 1 partial :warning:
src/ridgeplot/_ridgeplot.py	50.00%	1 Missing :warning:

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #154 +/- ## =========================================== - Coverage 86.43% 62.62% -23.82% =========================================== Files 10 11 +1 Lines 376 412 +36 Branches 66 67 +1 =========================================== - Hits 325 258 -67 - Misses 39 149 +110 + Partials 12 5 -7 ``` | [Flag](https://app.codecov.io/gh/tpvasconcelos/ridgeplot/pull/154/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Tomas+Pereira+de+Vasconcelos) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/tpvasconcelos/ridgeplot/pull/154/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Tomas+Pereira+de+Vasconcelos) | `62.62% <72.41%> (-23.82%)` | :arrow_down: | 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=Tomas+Pereira+de+Vasconcelos#carryforward-flags-in-the-pull-request-comment) to find out more.

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