Cleanup task list and re-organize file structure

[chihsuan]

Submission Review Guidelines:

• I have followed the WooCommerce Contributing Guidelines and the WordPress Coding Standards.
• I have checked to ensure there aren't other open Pull Requests for the same update/change.
• I have reviewed my code for security best practices.
• Following the above guidelines will result in quick merges and clear and detailed feedback when appropriate.

Changes proposed in this Pull Request:

While updating the task list document, I noticed that we have many outdated code that can be removed or deprecated, including task snooze APIs and old two-column experiment code.

Besides, we have three folders related to the task lists, which is very confusing. 😕

• tasks: include task list entry file
• task-lists: only contains progress title and header
• two-column-tasks: It's acutally setup task list, not related to two-columns.

Thus, this PR makes the following changes:

• Deprecate onboarding task snooze APIs c30d63c (snooze feature has been drepcated in Cleanup and deprecate task properties and methods #35450)
• Removes the remaining two-column experiment code in the task list (in both backend and frontend)
• Re-organizes task list file structure:
  • Merge ./client/tasks folder into ./client/task-lists To express what it actually is.
  • Rename two-column-tasks to setup-task-list and also move it into ./client/task-lists folder
  • Update the corresponding component names and import paths
  • Moves components to ./task-lists/components folder

After merging this, we can find all frontend task list files in ./client/task-lists/ directory.

How to test the changes in this Pull Request:

Using the WooCommerce Testing Instructions Guide, include your detailed testing instructions:

1. Install and activate WooCommerce in a brand new site
2. Go to WooCommerce > Home
3. Confirm the task lists are shown as expected as previous
4. Perform a smoke test on the task list
5. Complete set up a task list
6. Observe that task list completion UI is shown

[github-actions]

Hi @moon0326, @adrianduffell, @woocommerce/ghidorah

Apart from reviewing the code changes, please make sure to review the testing instructions as well.

You can follow this guide to find out what good testing instructions should look like:
https://github.com/woocommerce/woocommerce/wiki/Writing-high-quality-testing-instructions

[github-actions]

Test Results Summary

Commit SHA: 81fcbee

Test 🧪	Passed ✅	Failed 🚨	Broken 🚧	Skipped ⏭️	Unknown ❔	Total 📊	Duration ⏱️
API Tests	267	0	0	2	0	269	0m 51s
E2E Tests	189	0	0	10	0	199	18m 28s

---

To view the full API test report, click here.
To view the full E2E test report, click here.
To view all test reports, visit the WooCommerce Test Reports Dashboard.

[codecov]

Codecov Report

Merging #38271 (81fcbee) into trunk (8c7fa2e) will increase coverage by 0.3%.
The diff coverage is 100.0%.

Additional details and impacted files

@@            Coverage Diff             @@
##             trunk   #38271     +/-   ##
==========================================
+ Coverage     51.2%    51.5%   +0.3%     
- Complexity   17439    17443      +4     
==========================================
  Files          440      440             
  Lines        80722    80290    -432     
==========================================
  Hits         41348    41348             
+ Misses       39374    38942    -432     

Impacted Files	Coverage Δ
plugins/woocommerce/includes/wc-core-functions.php	63.6% <100.0%> (ø)

... and 5 files with indirect coverage changes

[moon0326]

Thank you for working on it 👍

LGTM and everything worked as expected on WooCommerce Home 🚀

[adrianduffell]

Tested well and the new folder layout is much nicer. Love to see a negative code line diff in a PR! 🚀