feat(github): Job Builder Class

[dkershner6]

Fixes #3315

Just a proposal, once we have a direction I will test and such.

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[codecov-commenter]

Codecov Report

Attention: 112 lines in your changes are missing coverage. Please review.

Comparison is base (db6ca4b) 96.39% compared to head (ed433dc) 96.12%.

Files	Patch %	Lines
src/github/workflow-job-builder.ts	67.44%	112 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3316      +/-   ##
==========================================
- Coverage   96.39%   96.12%   -0.27%     
==========================================
  Files         191      192       +1     
  Lines       36503    36828     +325     
  Branches     3403     3422      +19     
==========================================
+ Hits        35186    35401     +215     
- Misses       1317     1427     +110     

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[mrgrain]

Before you get into development, can you write (or update) a pseudo documentation page illustrating how this new API would be intended to be used? This might be better done and discussed on the issue.