✨ feat(tags): add compact_tags option

[welpo]

Summary

Adds an option to display tags in the All Tags page in a more compact way.

By default, the tags page displays tags as:

TagName — n post[s]

Setting compact_tags = true will display them as:

TagName ⁿ

Related issue

Implements #230.

Accessibility

The smaller superscript is slightly less accessible. This is why:

• It's an optional setting;
• The aria-label indicates screen readers should read aloud "tag name n posts" (not just "tag name n");
• It's not part of the link, increasing text-background contrast.

Screenshots

Default, compact_tags = false:

compact_tags = true:

Type of change

• Bug fix (fixes an issue without altering functionality)
• 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

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