Hide the llms.txt file in multisites

[leonidasmi]

Context

• Llms.txt feature is disabled in multisites, so we need to hide its task in those setups
• If we don't, trying to complete the llms.txt task in a multisite results in error.

Summary

This PR can be summarized in the following changelog entry:

• Hides the llms.txt task in multisites, since the feature is disabled in such setups.

Relevant technical choices:

Test instructions

Test instructions for the acceptance test before the PR gets merged

This PR can be acceptance tested by following these steps:

• In a multisite, go to the task list tab
• Confirm that there's no llms.txt task
• Complete a couple of tasks there, the Delete the Hello World post one included, and confirm no issues
• Install Premium and repeat the tests
• Repeat all tests in a non-multisite setup and confirm the same except that we except to see the llms.txt task there. Also complete the llms.txt task via its button

Relevant test scenarios

• Changes should be tested with the browser console open
• Changes should be tested on different posts/pages/taxonomies/custom post types/custom taxonomies
• 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

Test instructions for QA when the code is in the RC

• QA should use the same steps as above.

Impact check

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

Other environments

• 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.

Documentation

• 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.

Quality assurance

• 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.
• I have ran grunt build:images and commited the results, if my PR introduces new images or SVGs.

Innovation

• 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 #

[coveralls]

Pull Request Test Coverage Report for Build db1b578dc88e4594052f2e3009db8d0fdc25a311

Details

• 0 of 7 (0.0%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-4.1%) to 48.916%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/task-list/application/tasks/enable-llms-txt.php	0	2	0.0%
src/task-list/domain/tasks/abstract-task.php	0	2	0.0%
src/task-list/infrastructure/tasks-collectors/tasks-collector.php	0	3	0.0%

Totals
Change from base Build 4336475e148875f8d109b43a56669828f6ac244e:	-4.1%
Covered Lines:	17510
Relevant Lines:	35796

---

💛 - Coveralls

[JorPV]

Works like a charm ✅