Test crate

[prsabahrami]

Added a crate for testing. Created the repo on top of #124, so after merging this we can remove the other PR

[codecov]

Codecov Report

Attention: Patch coverage is 76.47059% with 16 lines in your changes missing coverage. Please review.

Project coverage is 68.67%. Comparing base (8b08567) to head (2d70dc1).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/shell/src/commands/which.rs	37.50%	15 Missing ⚠️
crates/shell/src/main.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #135      +/-   ##
==========================================
+ Coverage   68.27%   68.67%   +0.39%     
==========================================
  Files          26       28       +2     
  Lines        2005     2062      +57     
==========================================
+ Hits         1369     1416      +47     
- Misses        636      646      +10     

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[certik]

Thanks for adding this --- I think this now tests the actual shell execution in crates/tests/src/lib.rs, correct?

I'll let @wolfv to review this. But we definitely need such tests (see #82).

[prsabahrami]

Yes! This tests shell's execution.

[Hofer-Julian]

Looks excellent!

Had a few minor comments :)