chore: lint with Ruff

[frostming]

Pull Request Checklist

• A news fragment is added in news/ describing what is new.
• Test cases added for changed code.

Describe what you have changed in this PR.

• Use Ruff as the linter
• Change max line length to 120

[codecov-commenter]

Codecov Report

Base: 85.22% // Head: 85.12% // Decreases project coverage by -0.10% ⚠️

Coverage data is based on head (0c60b4d) compared to base (870f712).
Patch coverage: 85.99% of modified lines in pull request are covered.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1715      +/-   ##
==========================================
- Coverage   85.22%   85.12%   -0.10%     
==========================================
  Files          92       92              
  Lines        8631     8634       +3     
  Branches     1864     1863       -1     
==========================================
- Hits         7356     7350       -6     
- Misses        858      865       +7     
- Partials      417      419       +2     

Flag	Coverage Δ
unittests	84.94% <85.99%> (-0.10%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/pdm/cli/commands/search.py	67.34% <0.00%> (ø)
src/pdm/cli/commands/venv/remove.py	88.00% <0.00%> (ø)
src/pdm/installers/core.py	100.00% <ø> (ø)
src/pdm/models/project_info.py	94.28% <ø> (ø)
src/pdm/models/backends.py	84.70% <50.00%> (ø)
src/pdm/models/environment.py	67.19% <57.14%> (ø)
src/pdm/builders/editable.py	77.14% <60.00%> (ø)
src/pdm/cli/commands/config.py	85.29% <60.00%> (ø)
src/pdm/cli/commands/cache.py	83.33% <66.66%> (ø)
src/pdm/cli/commands/venv/backends.py	88.57% <66.66%> (ø)
... and 71 more

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