Implement tom-select for related documents

[smithellis]

• Don't allow addition of article to it's own related
• Don't show old checkbox list on edit or new document pages
• On document view pages, don't show restricted articles in the related documents section if the user lacks permissions

This should fix 2259, 2260, 2261

[Copilot]

Pull Request Overview

This PR implements Tom Select for improved related documents management while adding filtering to exclude the current and restricted documents.

• Replaces the old checkbox list with a Tom Select based search input on edit and new document pages.
• Updates search queries and results to include document IDs and the is_restricted flag.
• Introduces the is_restricted field in the search index for documents.

Reviewed Changes

Copilot reviewed 3 out of 5 changed files in this pull request and generated no comments.

File	Description
kitsune/sumo/static/sumo/js/wiki_search.js	Refactors the UI to integrate Tom Select and filters documents based on current document and is_restricted status.
kitsune/search/search.py	Propagates the is_restricted flag in the search result.
kitsune/search/documents.py	Adds a new Boolean is_restricted field and its preparation method for documents.

Files not reviewed (2)

• kitsune/sumo/static/sumo/scss/components/_wiki.scss: Language not supported
• kitsune/wiki/jinja2/wiki/includes/related_docs_widget.html: Language not supported

Comments suppressed due to low confidence (1)

kitsune/sumo/static/sumo/js/wiki_search.js:75

• Consider ensuring that both item.id and currentDocId have consistent types by converting them (for example, using parseInt) and using strict equality (!==) to avoid potential type coercion issues.

.filter(item => !currentDocId || item.id != currentDocId)

[Copilot]

Copilot reviewed 1 out of 4 changed files in this pull request and generated no comments.

Files not reviewed (3)

• kitsune/sumo/static/sumo/scss/components/_wiki.scss: Language not supported
• kitsune/wiki/jinja2/wiki/includes/document_macros.html: Language not supported
• kitsune/wiki/jinja2/wiki/includes/related_docs_widget.html: Language not supported

Comments suppressed due to low confidence (1)

kitsune/sumo/static/sumo/js/wiki_search.js:87

• The render.item function both appends the rendered template to $relatedDocsList and returns an HTML string, which might result in duplicate rendering of the same item. Consider removing the side-effect append so that rendering is handled solely by the return value.

$relatedDocsList.append(nunjucksEnv.render('wiki-related-doc.njk', context));