feat: Add read/write for CUnion

[markehammons]

Fixes #175

[codecov]

Codecov Report

Merging #186 (488bf62) into master (2d7f862) will increase coverage by 0.27%.
The diff coverage is 93.75%.

@@            Coverage Diff             @@
##           master     #186      +/-   ##
==========================================
+ Coverage   59.74%   60.01%   +0.27%     
==========================================
  Files          61       61              
  Lines        1699     1703       +4     
  Branches       22       22              
==========================================
+ Hits         1015     1022       +7     
+ Misses        684      681       -3     

Flag	Coverage Δ
macos-latest	59.65% <93.75%> (+0.27%)	⬆️
ubuntu-latest	59.60% <93.75%> (+0.27%)	⬆️
windows-latest	59.60% <93.75%> (+0.27%)	⬆️

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Impacted Files	Coverage Δ
core/src/fr/hammons/slinc/TypeDescriptor.scala	12.50% <0.00%> (ø)
...rc/fr/hammons/slinc/modules/TransitionModule.scala	0.00% <ø> (ø)
j17/src/fr/hammons/slinc/Allocator17.scala	76.00% <ø> (ø)
...src/fr/hammons/slinc/modules/LinkageModule17.scala	81.81% <ø> (-1.04%)	⬇️
.../fr/hammons/slinc/modules/TransitionModule17.scala	86.66% <ø> (-3.81%)	⬇️
j19/src/fr/hammons/slinc/Scope19.scala	100.00% <ø> (ø)
.../fr/hammons/slinc/modules/TransitionModule19.scala	86.66% <ø> (-4.25%)	⬇️
j19/src/fr/hammons/slinc/Mem19.scala	85.71% <50.00%> (+2.38%)	⬆️
j17/src/fr/hammons/slinc/Mem17.scala	90.74% <100.00%> (+2.27%)	⬆️
j17/src/fr/hammons/slinc/Scope17.scala	100.00% <100.00%> (ø)
... and 5 more

... and 2 files with indirect coverage changes

[sonarqubecloud]

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0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication