add validate-pyproject

[CagtayFabry]

Changes

add validate-pyproject to pre-commit

[github-actions[bot]]

Test Results

2 184 tests  ±0   2 183 :heavy_check_mark: ±0   2m 29s :stopwatch: -49s        1 suites ±0          1 :zzz: ±0         1 files   ±0          0 :x: ±0 

Results for commit e32e5661. ± Comparison against base commit 132c5760.

:recycle: This comment has been updated with latest results.

[codecov[bot]]

Codecov Report

Merging #841 (e32e566) into master (132c576) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #841   +/-   ##
=======================================
  Coverage   96.83%   96.83%           
=======================================
  Files          92       92           
  Lines        6071     6071           
=======================================
  Hits         5879     5879           
  Misses        192      192           

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[CagtayFabry]

instead of https://github.com/BAMWelDX/weldx/pull/839

I manually reformatted pyproject.toml for consistency @marscher