Project metadata to pyproject.toml + remove i18n

[marscher]

• Removed internationalization of widgets
• Removed unused code
• Updated CI (ruff)
• Fixed ruff and formatting issues

[codecov]

Codecov Report

Attention: 11 lines in your changes are missing coverage. Please review.

Comparison is base (86df683) 74.96% compared to head (1efcc7d) 81.60%.
Report is 2 commits behind head on main.

Files	Patch %	Lines
weldx_widgets/widget_evaluate.py	58.82%	7 Missing ⚠️
weldx_widgets/generic.py	33.33%	2 Missing ⚠️
weldx_widgets/visualization/colors.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #107      +/-   ##
==========================================
+ Coverage   74.96%   81.60%   +6.64%     
==========================================
  Files          30       15      -15     
  Lines        2073     1495     -578     
==========================================
- Hits         1554     1220     -334     
+ Misses        519      275     -244     

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