Rename config items to be more organized

[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 #914 (f0293e2) into main (b37a3ec) will decrease coverage by 0.42%.
The diff coverage is 77.41%.

@@            Coverage Diff             @@
##             main     #914      +/-   ##
==========================================
- Coverage   84.11%   83.68%   -0.43%     
==========================================
  Files          74       74              
  Lines        6426     6448      +22     
  Branches     1321     1332      +11     
==========================================
- Hits         5405     5396       -9     
- Misses        703      738      +35     
+ Partials      318      314       -4     

Flag	Coverage Δ
unittests	83.45% <77.41%> (-0.43%)	⬇️

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Impacted Files	Coverage Δ
pdm/cli/actions.py	79.88% <ø> (ø)
pdm/installers/installers.py	83.92% <ø> (ø)
pdm/project/core.py	89.91% <66.66%> (ø)
pdm/cli/commands/config.py	90.19% <72.22%> (-1.30%)	⬇️
pdm/project/config.py	93.44% <80.00%> (-2.72%)	⬇️
pdm/installers/synchronizers.py	86.81% <100.00%> (ø)
pdm/models/setup.py	42.29% <0.00%> (-10.28%)	⬇️

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