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[bot]]

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 :warning:

Additional details and impacted files

```diff @@ 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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