#8606 refactor files in pageEditor/ directory root

[mnholtz]

What does this PR do?

• Closes Move/reorganize root-level src/pageEditor components #8606
• Light reorganization of the pageEditor directory structure
  • Notably the introduction of a store/ and layout/ directory
• See commit history for a summary of what was changed
• There are no functional changes in this PR; the 180 file change should be relatively easy to go through due to simple import diffs

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.24%. Comparing base (8318d74) to head (b5c8ff8).
Report is 10 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8749      +/-   ##
==========================================
- Coverage   74.24%   74.24%   -0.01%     
==========================================
  Files        1332     1332              
  Lines       40817    40825       +8     
  Branches     7634     7635       +1     
==========================================
+ Hits        30306    30311       +5     
- Misses      10511    10514       +3     

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[fungairino]

nit: I prefer a naming schema following something like:

/savingModComponent/slice or using an index /savingModComponent/index

that exports a savingModComponentSlice

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[github-actions]

Playwright test results

 83 passed
 1 flaky
 2 skipped

Details

 Open report ↗︎
 86 tests across 30 suites
 12 minutes, 31 seconds
 b5c8ff8

Flaky tests

chrome › tests/regressions/welcomeStarterBricks.spec.ts › #8740: can view the starter mods on the pixiebrix.com/welcome page

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