GH-370: Implement ability to create JARs from existing workspaces

[ascopes]

Closes GH-370.

[codecov-commenter]

Codecov Report

Merging #371 (204df3a) into main (20f40ff) will increase coverage by 0.02%.
The diff coverage is 79.16%.

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@@            Coverage Diff             @@
##             main     #371      +/-   ##
==========================================
+ Coverage   81.21%   81.23%   +0.02%     
==========================================
  Files          91       92       +1     
  Lines        2816     2835      +19     
  Branches      234      234              
==========================================
+ Hits         2287     2303      +16     
- Misses        480      483       +3     
  Partials       49       49              

Impacted Files	Coverage Δ
...b/ascopes/jct/workspaces/impl/FileBuilderImpl.java	43.18% <37.50%> (-3.16%)	⬇️
...ub/ascopes/jct/workspaces/impl/JarFactoryImpl.java	100.00% <100.00%> (ø)

[github-actions]

Test Results

  1 640 files  +12    1 640 suites  +12   0s ⏱️ ±0s
23 588 tests +48  23 575 ✔️ +48  13 💤 ±0  0 ❌ ±0 
23 852 runs  +48  23 839 ✔️ +48  13 💤 ±0  0 ❌ ±0 

Results for commit 204df3a. ± Comparison against base commit 20f40ff.