wordpress-seo 568 add guard to the loading scripts for features that are disabled in free

Context

This PR can be summarized in the following changelog entry:

Adds guard for enqueuing content analysis styling when content analysis feature is disabled.

AI generator and fix assessments styling will be remove by separate PR that introduces AI in free.
Removed out dated css that was added in this PR For the taxonomy overall score icon.
Removed outdated css for taxonomy overview page for seo title (not used).
Removed enququeing of language script in admin pages. Not needed. Only for editors.

This PR can be acceptance tested by following these steps:

Go to Yoast SEO->Settings->Site features
Disable readability analysis
Edit a post in classic/block-editor/elementor .
View page source and check there are no styling starting with 'yst_seo_score-' enqueued.
Check the seo analysis and inclusive language analysis looks the same.
Edit a Term and repeat the above steps.
Edit a post and go to readability tab, click on the eye icon and check the text is highlighted in the editor.
Go to Yoast SEO->Settings->Site features
Disable SEO analysis, Readability analysis, Inclusive language analysis, Insights and cornerstone content.
Edit a post in classic/block-editor/elementor and edit a term and the the language script is not loaded, if you are testing in english them search for "yoast-seo-en-language-js".

[X] Changes should be tested with the browser console open
[X] Changes should be tested on different posts/pages/taxonomies/custom post types/custom taxonomies
[X] Changes should be tested on different editors (Default Block/Gutenberg/Classic/Elementor/other)
[ ] Changes should be tested on different browsers
[ ] Changes should be tested on multisite

QA can test this PR by following these steps:

This PR affects the following parts of the plugin, which may require extra testing:

[ ] This PR changes the UI in the plugin. I have added the 'UI change' label to this PR.

[ ] This PR also affects Shopify. I have added a changelog entry starting with [shopify-seo], added test instructions for Shopify and attached the Shopify label to this PR.

[ ] I have written documentation for this change. For example, comments in the Relevant technical choices, comments in the code, documentation on Confluence / shared Google Drive / Yoast developer portal, or other.

[X] I have tested this code to the best of my abilities.
[ ] During testing, I had activated all plugins that Yoast SEO provides integrations for.
[ ] I have added unit tests to verify the code works as intended.
[ ] If any part of the code is behind a feature flag, my test instructions also cover cases where the feature flag is switched off.
[ ] I have written this PR in accordance with my team's definition of done.
[ ] I have checked that the base branch is correctly set.

[X] No innovation project is applicable for this PR.
[ ] This PR falls under an innovation project. I have attached the innovation label.
[ ] I have added my hours to the WBSO document.

Fixes https://github.com/Yoast/reserved-tasks/issues/568

May 14 '25 14:05 vraja-pro

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
admin/taxonomy/class-taxonomy.php	4	6	66.67%
admin/metabox/class-metabox.php	3	9	33.33%
src/integrations/third-party/elementor.php	0	6	0.0%
<!--	Total:	7	21

Files with Coverage Reduction	New Missed Lines	%
admin/taxonomy/class-taxonomy-metabox.php	1	0.0%
<!--	Total:	1

Totals
Change from base Build 88257803bc6f7a58da4a102fb5dfc4ef74f7f98c:	-0.5%
Covered Lines:	29117
Relevant Lines:	56514

May 14 '25 17:05 coveralls

CR was done and approved by @mhkuu

Jul 04 '25 07:07 vraja-pro