Documentation about state machines and few refinements along the way

[widmogrod]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 35.27738% with 455 lines in your changes are missing coverage. Please review.

Project coverage is 36.29%. Comparing base (e02b91b) to head (73b719d).
Report is 8 commits behind head on main.

Files	Patch %	Lines
x/projection/projection_union_gen.go	2.41%	323 Missing ⚠️
x/machine/test_suite.go	56.30%	45 Missing and 7 partials ⚠️
x/schema/go.go	48.52%	29 Missing and 6 partials ⚠️
example/state/machine.go	84.78%	10 Missing and 4 partials ⚠️
cmd/mkunion/main.go	0.00%	8 Missing ⚠️
x/machine/machine.go	52.94%	8 Missing ⚠️
x/shape/togo.go	0.00%	8 Missing ⚠️
x/generators/serde_json_union.go	76.47%	4 Missing ⚠️
x/machine/infer_state_machine.go	83.33%	1 Missing and 1 partial ⚠️
x/shape/lookup_refs.go	94.73%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #112      +/-   ##
==========================================
+ Coverage   33.61%   36.29%   +2.67%     
==========================================
  Files         129      162      +33     
  Lines       25269    30410    +5141     
==========================================
+ Hits         8494    11036    +2542     
- Misses      16295    18707    +2412     
- Partials      480      667     +187     

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