fix: retry remove_dir_all 3 times in ensure_clean

[wangl-cc]

Workaround of the #319

[wangl-cc]

@starrin 既然失败了就多等一会吧，也不差这一两秒

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 5 lines in your changes missing coverage. Please review.

Project coverage is 63.15%. Comparing base (3ffe5d8) to head (508498d).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
maa-cli/src/dirs.rs	50.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #320      +/-   ##
==========================================
- Coverage   63.20%   63.15%   -0.05%     
==========================================
  Files          42       42              
  Lines        3386     3395       +9     
==========================================
+ Hits         2140     2144       +4     
- Misses       1246     1251       +5     

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