docs: add docs for writing playwright tests

[ntindle]

Nick wants others to be able to write tests besides Nick

Changes 🏗️

• Fixes various import errors across the docs to fix dead links
• Adds Docs for making and debugging your own tests

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[qodo-merge-pro]

PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 2 🔵🔵⚪⚪⚪

🧪 PR contains tests

🔒 No security concerns identified

⚡ Recommended focus areas for review Code Formatting The file contains a comment warning about not running autoformatting. Consider finding a better solution that doesn't require disabling formatting, as this can lead to inconsistent code style. Documentation Clarity The test documentation could benefit from more examples of negative test cases and error handling scenarios, not just the happy path examples currently shown.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

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Additional details and impacted files

@@          Coverage Diff           @@
##             dev    #8877   +/-   ##
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  Coverage       ?   58.16%           
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  Files          ?      106           
  Lines          ?     5765           
  Branches       ?      720           
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  Hits           ?     3353           
  Misses         ?     2306           
  Partials       ?      106           

Flag	Coverage Δ
Linux	57.86% <ø> (?)
Windows	54.64% <ø> (?)
forge	58.03% <ø> (?)
macOS	57.03% <ø> (?)

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[Swiftyos]

Very useful, thank you