Drop tour starter brick and related bricks

[twschiller]

What does this PR do?

• Removes the Tour Starter brick, we decided not to move toward GA. Removes as single PR, so it's easier for us to re-add in the future
• To run locally, you'll need Prevent retired starter bricks in saved standalone mods from crashing mods screen #8728 if you have and standalone mods containing tours

Remaining Work

• Fix bad rebase/merge
• Clean up dead code: https://github.com/pixiebrix/pixiebrix-extension/actions/runs/9718572929/job/26826736349?pr=8726
• Review failing e2e tests

For more information on our expectations for the PR process, see the
code review principles doc

[codecov]

Codecov Report

Attention: Patch coverage is 80.74324% with 57 lines in your changes missing coverage. Please review.

Project coverage is 74.23%. Comparing base (c32e86f) to head (23be065).
Report is 66 commits behind head on main.

❗ Current head 23be065 differs from pull request most recent head 7c92e21

Please upload reports for the commit 7c92e21 to get more accurate results.

Files	Patch %	Lines
src/pageEditor/starterBricks/quickBarProvider.ts	0.00%	10 Missing ⚠️
src/pageEditor/starterBricks/quickBar.ts	20.00%	8 Missing ⚠️
src/pageEditor/hooks/useResetModComponent.ts	25.00%	6 Missing ⚠️
src/pageEditor/starterBricks/contextMenu.ts	40.00%	6 Missing ⚠️
src/bricks/effects/tourEffect.ts	84.00%	4 Missing ⚠️
src/mods/useMods.ts	90.24%	4 Missing ⚠️
...pageEditor/hooks/useUpsertModComponentFormState.ts	72.72%	3 Missing ⚠️
src/pageEditor/starterBricks/adapter.ts	80.00%	3 Missing ⚠️
src/permissions/modComponentPermissionsHelpers.ts	80.00%	3 Missing ⚠️
src/pageEditor/hooks/useResetMod.ts	33.33%	2 Missing ⚠️
... and 6 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8726      +/-   ##
==========================================
+ Coverage   73.69%   74.23%   +0.53%     
==========================================
  Files        1344     1333      -11     
  Lines       41566    40840     -726     
  Branches     7775     7632     -143     
==========================================
- Hits        30633    30317     -316     
+ Misses      10933    10523     -410     

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[github-actions]

Playwright test results

 2 failed
 80 passed
 2 skipped

Details

 Open report ↗︎
 84 tests across 29 suites
 12 minutes, 51 seconds
 23be065

Failed tests

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

[twschiller]

Closing because Github is in a bad state