fix: don't use current_exe impl from maa_cli mod

[wangl-cc]

The maa_cli mod is not available if self feature is disabled.

[codecov-commenter]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (c5f7277) 21.59% compared to head (dacf450) 21.57%.

❗ Current head dacf450 differs from pull request most recent head 13f5b67. Consider uploading reports for the commit 13f5b67 to get more accurate results

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #78      +/-   ##
==========================================
- Coverage   21.59%   21.57%   -0.02%     
==========================================
  Files          20       20              
  Lines        1468     1469       +1     
==========================================
  Hits          317      317              
- Misses       1151     1152       +1     

Files	Coverage Δ
maa-cli/src/installer/maa_cli.rs	0.00% <ø> (ø)
maa-cli/src/installer/maa_core.rs	4.00% <0.00%> (-0.09%)	⬇️

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.