Add support for symlinks in toolchains.

[afranchuk]

Closes #2028.

[sylvestre]

@afranchuk nice to see you here :)

[sylvestre]

would it be possible to add a test ?

[codecov-commenter]

Codecov Report

Attention: 37 lines in your changes are missing coverage. Please review.

Comparison is base (b260af4) 30.64% compared to head (49c2e53) 30.99%.
Report is 5 commits behind head on main.

Files	Patch %	Lines
src/dist/pkg.rs	15.90%	33 Missing and 4 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2030      +/-   ##
==========================================
+ Coverage   30.64%   30.99%   +0.34%     
==========================================
  Files          51       51              
  Lines       19638    19639       +1     
  Branches     9428     9437       +9     
==========================================
+ Hits         6018     6087      +69     
+ Misses       8011     7891     -120     
- Partials     5609     5661      +52     

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[afranchuk]

would it be possible to add a test ?

The thought crossed my mind, but superficially it seems like it'd be a bit tricky. There are no existing tests for any of the packaging, so I'd have to build the boilerplate for mocking an existing filesystem from which the toolchain is created. But if you'd like to see some tests I can be the first to fill that gap!