Workflow/toggle events

[alharris-at]

Issue #, if available:
N/A

Description of changes:
Adding custom handling for CheckboxField and SwitchField, they're still not quite working correctly, but I'm going to review the behavior w/ the UI team via this PR.

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[codecov-commenter]

Codecov Report

Merging #390 (33e5adc) into tagged-release/q1-release (60fa012) will increase coverage by 0.07%.
The diff coverage is 96.96%.

@@                      Coverage Diff                      @@
##           tagged-release/q1-release     #390      +/-   ##
=============================================================
+ Coverage                      93.66%   93.73%   +0.07%     
=============================================================
  Files                             43       43              
  Lines                           1641     1661      +20     
  Branches                         353      359       +6     
=============================================================
+ Hits                            1537     1557      +20     
  Misses                           102      102              
  Partials                           2        2              

Impacted Files	Coverage Δ
...ges/codegen-ui-react/lib/imports/import-mapping.ts	100.00% <ø> (ø)
packages/codegen-ui-react/lib/primitive.ts	100.00% <ø> (ø)
...s/codegen-ui-react/lib/react-component-renderer.ts	86.53% <50.00%> (+0.26%)	⬆️
...eact/lib/react-component-with-children-renderer.ts	95.45% <100.00%> (+0.06%)	⬆️
packages/codegen-ui-react/lib/workflow/events.ts	93.10% <100.00%> (+1.79%)	⬆️
packages/codegen-ui-react/lib/workflow/mutation.ts	98.00% <100.00%> (+0.29%)	⬆️

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