Feature: Configurable global project path

[frostming]

Pull Request Check List

• 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-commenter]

Codecov Report

Merging #986 (2e349ec) into main (6aaa695) will increase coverage by 0.40%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #986      +/-   ##
==========================================
+ Coverage   83.55%   83.95%   +0.40%     
==========================================
  Files          74       74              
  Lines        6470     6470              
  Branches     1342     1342              
==========================================
+ Hits         5406     5432      +26     
+ Misses        747      712      -35     
- Partials      317      326       +9     

Flag	Coverage Δ
unittests	83.70% <100.00%> (+0.40%)	⬆️

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

Impacted Files	Coverage Δ
pdm/project/config.py	91.93% <ø> (ø)
pdm/project/core.py	89.91% <100.00%> (ø)
pdm/models/setup.py	52.96% <0.00%> (+10.27%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update f77d896...2e349ec. Read the comment docs.