Render example objects from any high level compatible model

[daveshanley]

Any object that supports Example or Examples and contains a Schema can be rendered into a Mock object.

By default, it will try to use existing example values. If that can't be found - it will generate random data using the available type, format, and pattern properties defined in a schema.

Will address feature request #107
It also addresses issue #156. There are a couple of minor race conditions being hit, and they have been remedied with a few tweaks.

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (9daaecc) 99.79% compared to head (c9c0183) 99.80%.

Additional details and impacted files

@@           Coverage Diff            @@
##             main     #162    +/-   ##
========================================
  Coverage   99.79%   99.80%            
========================================
  Files         146      148     +2     
  Lines       10405    10619   +214     
========================================
+ Hits        10384    10598   +214     
  Misses         21       21            

Flag	Coverage Δ
unittests	99.80% <100.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
datamodel/high/shared.go	100.00% <ø> (ø)
datamodel/low/v2/definitions.go	100.00% <100.00%> (ø)
renderer/mock_generator.go	100.00% <100.00%> (ø)
renderer/schema_renderer.go	100.00% <100.00%> (ø)
what-changed/model/comparison_functions.go	99.42% <100.00%> (+<0.01%)	⬆️

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