feat: support download directory white list

[monkeyWie]

related: #598

[codecov]

Codecov Report

Attention: Patch coverage is 62.50000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 61.49%. Comparing base (d375046) to head (e5d1210).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/download/downloader.go	62.50%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #752      +/-   ##
==========================================
+ Coverage   61.30%   61.49%   +0.19%     
==========================================
  Files          35       35              
  Lines        3615     3623       +8     
==========================================
+ Hits         2216     2228      +12     
+ Misses       1127     1119       -8     
- Partials      272      276       +4     

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