feat: Allow exclusion of dependencies

[frostming]

Fixes #1316

Signed-off-by: Frost Ming [email protected]

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.

[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (7a29fcb) 84.69% compared to head (1a37165) 84.69%.

Files	Patch %	Lines
src/pdm/resolver/providers.py	77.77%	1 Missing and 1 partial ⚠️
src/pdm/environments/__init__.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2551      +/-   ##
==========================================
- Coverage   84.69%   84.69%   -0.01%     
==========================================
  Files         104      104              
  Lines       10339    10345       +6     
  Branches     2261     2264       +3     
==========================================
+ Hits         8757     8762       +5     
  Misses       1109     1109              
- Partials      473      474       +1     

Flag	Coverage Δ
unittests	84.48% <85.71%> (-0.01%)	⬇️

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