Add docs links to the page settings

[m1r0]

Proposed Changes

To help users better understand how to use the page settings, this PR adds docs links to the settings description.

Context

p1708014451312029-slack-C02P7FHLVR9

Testing Instructions

1. Go to Sensei LMS -> Settings -> General.
2. Check that the "Course Archive Page" setting has a link to this doc.
3. Check that the "My Courses Page" setting has a link to this doc.
4. Check that the "Course Completed Page" setting has a link to this doc.

Pre-Merge Checklist

• PR title and description contain sufficient detail and accurately describe the changes
• Acceptance criteria is met
• Decisions are publicly documented
• Adheres to coding standards (PHP, JavaScript, CSS, HTML)
• All strings are translatable (without concatenation, handles plurals)
• Follows our naming conventions (P6rkRX-4oA-p2)
• Hooks (p6rkRX-1uS-p2) and functions are documented
• New UIs are responsive and use a mobile-first approach
• New UIs match the designs
• Different user privileges (admin, teacher, subscriber) are tested as appropriate
• Legacy courses (course without blocks) are tested
• Code is tested on the minimum supported PHP and WordPress versions
• User interface changes have been tested on the latest versions of Chrome, Firefox and Safari
• "Needs Documentation" label is added if this change requires updates to documentation
• Known issues are created as new GitHub issues

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (27192b3) 51.26% compared to head (884ae10) 51.45%.
Report is 2 commits behind head on trunk.

Additional details and impacted files

@@             Coverage Diff              @@
##              trunk    #7488      +/-   ##
============================================
+ Coverage     51.26%   51.45%   +0.18%     
- Complexity    11189    11203      +14     
============================================
  Files           614      622       +8     
  Lines         47259    47408     +149     
  Branches        407      414       +7     
============================================
+ Hits          24229    24394     +165     
+ Misses        22703    22681      -22     
- Partials        327      333       +6     

Files	Coverage Δ
includes/class-sensei-settings.php	60.26% <100.00%> (+0.32%)	⬆️
includes/class-sensei-settings-api.php	25.95% <0.00%> (ø)

... and 1 file with indirect coverage changes

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[merkushin]

Looks good to me.

Maybe we need to update the docs (or at least add a corresponding label). Currently, the docs say about the purpose of each page, but they don't say that we can't use the same page for everything. WDYT?

[m1r0]

Thanks, Dmitry.

Currently, the docs say about the purpose of each page, but they don't say that we can't use the same page for everything. WDYT?

cc @jinnypark because she added the docs.

[jinnypark]

@m1r0 and @merkushin - the doc is in progress, but I have limited time to continue updating them. I ran out of time, so it's kind of in a 'draft'. I won't have time until tomorrow at the earliest to do more updates, so feel free to update them! We can continue conversations about docs update to this issue: https://github.com/Automattic/jpop-satellite-docs/issues/193