[2.x] Add conditional semantic documentation article rendering

[caendesilva]

This is the most elegant solution I have been able to come up with for reusing the base documentation layout for search pages.

Before this change, the following empty HTML is added to the full page search page:

<header id="document-header" class="flex items-center flex-wrap justify-between prose-h1:mb-3">

</header>
<section id="document-main-content" itemprop="articleBody">

</section>
<footer id="document-footer" class="flex items-center flex-wrap mt-8 prose-p:my-3 justify-between text-[90%]">

</footer>

This is of course not very semantic. But now, we can set the article to false, and this won't render.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (d764907) 99.95% compared to head (580c69e) 99.95%.

❗ Current head 580c69e differs from pull request most recent head 886c9c6. Consider uploading reports for the commit 886c9c6 to get more accurate results

Additional details and impacted files

@@              Coverage Diff              @@
##             2.x-dev    #1566      +/-   ##
=============================================
- Coverage      99.95%   99.95%   -0.01%     
+ Complexity      3504     1751    -1753     
=============================================
  Files            362      181     -181     
  Lines           9466     4731    -4735     
=============================================
- Hits            9462     4729    -4733     
+ Misses             4        2       -2     

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