Replace Flake8 with Ruff

[codecov[bot]]

Codecov Report

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

Comparison is base (666ccf3) 94.38% compared to head (dd58343) 94.38%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #278 +/- ## ========================================== - Coverage 94.38% 94.38% -0.01% ========================================== Files 5 5 Lines 2405 2403 -2 ========================================== - Hits 2270 2268 -2 Misses 135 135 ``` | [Flag](https://app.codecov.io/gh/jazzband/prettytable/pull/278/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jazzband) | Coverage Δ | | |---|---|---| | [macos-latest](https://app.codecov.io/gh/jazzband/prettytable/pull/278/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jazzband) | `94.34% <100.00%> (-0.01%)` | :arrow_down: | | [ubuntu-latest](https://app.codecov.io/gh/jazzband/prettytable/pull/278/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jazzband) | `94.34% <100.00%> (-0.01%)` | :arrow_down: | | [windows-latest](https://app.codecov.io/gh/jazzband/prettytable/pull/278/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=jazzband) | `94.29% <100.00%> (-0.01%)` | :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=jazzband#carryforward-flags-in-the-pull-request-comment) to find out more.

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.