#8596: improving mod definition snapshot capabilities - diffing

[fungairino]

What does this PR do?

• Part of #8596

Adds capabilities for comparing snapshots of mod definitions within end-to-end tests, improving the readability and focus of what is being tested. The new functionality will track the mod definition each time the snapshot is checked, and can be used even if the mod was not created via the modDefinitionNames fixture.

While writing this PR I also cleaned up some flaky behavior in editWorkshopModPage.ts which required some changes in the lifecycle spec.

Checklist

Leave all that are relevant and check off as completed

• [ ] This PR requires a security review
• [X] This PR introduces a new library: double check it's MIT/Apache2/permissively licensed
  • deep-diff - MIT
• [X] Added jest or playwright tests and/or storybook stories

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 74.24%. Comparing base (8318d74) to head (404be8d). Report is 19 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8754      +/-   ##
==========================================
- Coverage   74.24%   74.24%   -0.01%     
==========================================
  Files        1332     1332              
  Lines       40817    40826       +9     
  Branches     7634     7635       +1     
==========================================
+ Hits        30306    30312       +6     
- Misses      10511    10514       +3     

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[github-actions[bot]]

Playwright test results

 83 passed
 1 flaky
 2 skipped

Details

 Open report ↗︎
 86 tests across 30 suites
 13 minutes, 30 seconds
 404be8d

Flaky tests

edge › tests/regressions/doNotCloseSidebarOnPageEditorSave.spec.ts › #8104: Do not automatically close the sidebar when saving in the Page Editor

Skipped tests

chrome › tests/runtime/googleSheetsIntegration.spec.ts › can activate a google spreadsheet mod with config options edge › tests/runtime/googleSheetsIntegration.spec.ts › can activate a google spreadsheet mod with config options

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