Fix codeformat script for PEP 668 and apply code formatting.

[Hparty]

修复 codeformat.sh 在新版 Python (3.12+) 环境下安装 clang-format 失败的问题，改用 pipx 安装。

主要改动：

• pip3 install 改为 pipx install，避免 PEP 668 限制
• 设置 PATH 优先使用 pipx 安装的 clang-format 版本
• 应用 clang-format 14.0.0 格式化修正

参考：#3118

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.84%. Comparing base (ce1c42f) to head (24d8f91).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3299      +/-   ##
==========================================
+ Coverage   74.76%   74.84%   +0.08%     
==========================================
  Files         501      501              
  Lines       32765    32765              
  Branches    10701    10701              
==========================================
+ Hits        24496    24523      +27     
+ Misses       6059     6052       -7     
+ Partials     2210     2190      -20     

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