Improve documentation for discourse-categories-suppressed

Just following up on this in light of the recent post in Group owners should not necessarily be group members — both discussions reflect a growing need for more granular visibility controls that aren’t easily handled by muting, membership, or nesting alone.

The discourse-categories-suppressed plugin is already a huge help when you want to remove a category from Latest, New, and Unread without hiding it entirely from users. Some key use cases:

  • Staff inboxes (not secret, but shouldn’t distract from active discussions)
  • Opt-in communities that shouldn’t dominate the front page
  • Archives that should be visible but not promoted

To build on that, I’d suggest:

  • :white_check_mark: Adding this to the plugin directory with a proper topic + setup guide
  • :white_check_mark: Folding it into core UI via admin UI settings, with options like:
    • “Suppress from Latest/New/Unread”
    • “Suppress from search results”the plugin deosn’t already support this, but a UI checkbox would make it accessible
    • (Already implemented): suppressed categories appear in a “Muted Categories” dropdown at the bottom of the /categories page

These small improvements would let admins fine-tune discoverability and user experience. I’d be happy to contribute test cases or help document use patterns if this gains traction.