chore: delete setup.cfg, move tool configurations under it to pyproject.toml

[boholder]

Close #2703

Pull Request Checklist

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

Describe what you have changed in this PR.

As said in #2703, the goal is to removesetup.cfg file (and makes the tool configuration a little bit cleaner).

Result of pdm lint only shows two Windows special falsely positives (I'm working on a Windows PC) (because os module of cpython on windows do not have uname API):

***\pdm>pdm lint
pyupgrade................................................................Passed
ruff.....................................................................Passed
ruff-format..............................................................Passed
codespell................................................................Passed
mypy.....................................................................Failed
- hook id: mypy
- exit code: 1

src\pdm\environments\base.py:173: error: Module has no attribute "uname"; maybe "name"?  [attr-defined]
src\pdm\environments\base.py:182: error: Module has no attribute "uname"; maybe "name"?  [attr-defined]
Found 2 errors in 1 file (checked 111 source files)

I'm not sure how to test coverage config, let's see the bot's result.

[frostming]

Pre-commit linters are happy. But please fix the reference of setup.cfg in ci.yml

Also please add a news fragment under news/

[boholder]

But please fix the reference of setup.cfg in ci.yml

Also please add a news fragment under news/

Yep, now I see where is wrong, will working on it.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.83%. Comparing base (9746780) to head (235a51d).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2711      +/-   ##
==========================================
+ Coverage   84.80%   84.83%   +0.02%     
==========================================
  Files         104      104              
  Lines       10294    10325      +31     
  Branches     2236     2243       +7     
==========================================
+ Hits         8730     8759      +29     
- Misses       1092     1094       +2     
  Partials      472      472              

Flag	Coverage Δ
unittests	84.61% <ø> (+0.02%)	⬆️

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[boholder]

FYI here is a CI failure on my own workflow running in (3.10, windows-latest, pip, x64):
Is this a concurrency bug?
Yeah this occurs again on (3.9, windows-latest, pip, x64) combination under this PR...