[ISSUE #759] Support dynamic git clone for sub-workflows

[liooooo29]

Add a new executor called "git checkout executor" that can checkout a specified branch, commit, or tag from a repository.

• test repo
• test checkout branch clone result
• test checkout tag
• test commit

[yottahmd]

Hi @halalala222, thank you for your excellent work on the Git integration. It’s an impressive feature! Just one request, could you please update the PR to target the next branch instead of main? We're currently iterating on next, and merging from main tends to cause some conflicts. Sorry for the trouble, and thanks again!

[liooooo29]

ok !I change later

[yottahmd]

Oh sorry it was a mistake. Let's fix the conflict and merge! :)

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 62.89308% with 118 lines in your changes missing coverage. Please review.

Project coverage is 55.69%. Comparing base (b4961b0) to head (2f2c25d).

Files with missing lines	Patch %	Lines
internal/digraph/executor/checkout.go	62.89%	94 Missing and 24 partials :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             next     #941      +/-   ##
==========================================
+ Coverage   55.48%   55.69%   +0.20%     
==========================================
  Files          75       76       +1     
  Lines        8240     8626     +386     
==========================================
+ Hits         4572     4804     +232     
- Misses       3281     3404     +123     
- Partials      387      418      +31     

Files with missing lines	Coverage Δ
internal/digraph/executor/checkout.go	62.89% <62.89%> (ø)

... and 5 files with indirect coverage changes

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[yottahmd]

@halalala222 Sorry, I had to delete the next branch to avoid confusion. Would you mind opening the PR against the main branch when you get a chance? I’d really love to see this excellent feature merged. Thank you!