✨ feat: adjust width of prev/next link section

[welpo]

Summary

Allows setting the width of the previous/next article added in #246.

Related issue

Navigation feature was added in #246. This configuration feature was requested in #247.

Changes

Setting previous_next_article_links_full_width = false will make the navigation section for previous/next article matche article width, instead of the full width of the navigation bar at the top. Defaults to true.

This setting also follows the hierarchy.

Accessibility

Unaffected.

Screenshots

previous_next_article_links_full_width = false:

Type of change

• [ ] Bug fix (fixes an issue without altering functionality)
• [X] New feature (adds non-breaking functionality)
• [ ] Breaking change (alters existing functionality)
• [ ] UI/UX improvement (enhances user interface without altering functionality)
• [ ] Refactor (improves code quality without altering functionality)
• [ ] Documentation update
• [ ] Other (please describe below)

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Checklist

• [X] I have verified the accessibility of my changes
• [X] I have tested all possible scenarios for this change
• [X] I have updated theme.toml with a sane default for the feature
• [X] I have made corresponding changes to the documentation:
  • [X] Updated config.toml comments
  • [X] Updated theme.toml comments
  • [X] Updated "Mastering tabi" post in English
  • [X] (Optional) Updated "Mastering tabi" post in Spanish
  • [X] (Optional) Updated "Mastering tabi" post in Catalan