Add Mixpanel to Playwright

[bvaughn]

• Reorganized Mixpanel code to be a bit easier to reason about and added some more unit tests
  • Most of the lines changed in this PR comes from this reorganization
• Add some basic Mixpanel logging to the playwright and test-utils packages
  • Playwright specific tracking:
    • Invalid reporter config
    • Replay reporter used without Replay browser
  • Test utils tracking (also applies to Cypress)
    • Reporter error
    • Missing API key
    • Recording metadata
    • Test end
    • Test suite begin and end
    • Test suite results (including number of crashed recordings and uploaded recordings)
• Spot test and verify that events are ending up in Mixpanel

[changeset-bot]

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Latest commit: 7574459

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[replay-io]

Status	Complete ↗︎
Commit	2cc57b2
Results	❌ 2 Failed clicks a disappearing button should fail on this test ✅ 42 Passed adds items adds new items using a custom command adds todos following the fixture adds todos following the fixture adds todos following the fixture adds todos following the fixture calls inform complete all checkbox should update state when items are completed / cleared gets a number only gets a number only gets a number should allow me to add todo items should allow me to clear the complete state of all items should allow me to display active items should allow me to display all items should allow me to display completed items should allow me to edit an item should allow me to mark all items as completed should allow me to mark items as complete should allow me to un-mark items as complete should append new items to the bottom of the list should be hidden when there are no items that are completed should cancel edits on escape should clear text input field when an item is added should display the correct text should display the current number of todo items should focus on the todo input field should hide #main and #footer should hide other controls when editing should highlight the currently applied filter should intercept postman should invoke some commands that have exceptional option handling should log should persist its data should remove completed items when clicked should remove the item if an empty text string was entered should respect the back button should save edits on blur should show #main and #footer when items added should trim entered text should trim text input yields a number

[bvaughn]

/release-pr -> 0.0.0-pr577-20240701192536

[Andarist]

not directly related to this PR - but since the logger initialization is grouped together with the mixpanel's initialization in our test plugins it could also make sense to move that into this [...]/initialize.ts file here

[Andarist]

q: couldn't we use a single naming scheme for both of those "loggers"?

[bvaughn]

Yes we could but I don't know if there's value in doing that. They're tracking different things. Sometimes they'll line up (like here) but often they won't. Standardizing on names is work/effort.