Expand AI Actions cards

[mnocon]

This PR expands the "AI cards hub" so that it includes links to everything AI-related.

If you look at the current state of https://doc.ibexa.co/en/latest/ai_actions/ai_actions/ , it lacks information about many things that are not in the "AI node" in the doc structure - it's linking only to the neighbour documents, but not to things that are in different parts of the doc.

This PR expands this section to include other AI-related articles.

Things done in the Python macro:

1. It's now possible to link a specific section when linking to Markdown file (article#my-content)
2. It's possible to pass custom title and description instead of relying on the detected ones - it's needed when linking to a specific section, or when the default one is incorrect in other ways.

Preview:

• https://ez-systems-developer-documentation--2860.com.readthedocs.build/en/2860/ai_actions/ai_actions/

Some of the links are not working in the preview, that's because of the preview environment. They are working locally (and should work in production).

[github-actions[bot]]

Preview of modified files

Preview of modified Markdown:

• docs/ai_actions/ai_actions.md
• docs/search/ai_actions_search_reference/action_configuration_criteria.md
• docs/search/ai_actions_search_reference/action_configuration_sort_clauses.md

[mnocon]

Would we want to use this opportunity to align the landing pages between features?

Not now - I plan to expand the sections for Collaboration and Discounts when working on them, but I don't plan to touch the rest for now.