Plugin Directory: add a browse view for preview-enabled plugins

[tellyworth]

The Plugin Directory should provide a method for users to discover plugins that have playground previews enabled, in a similar way that they can find block-enabled or featured plugins.

I propose adding a new browse parameter like this:

wordpress.org/plugins/browse/preview/

It would list plugins with public live previews enabled, most recently updated first.

Initially the page would simply exist unlinked; deciding how to navigate to it is a separate question for design/ux teams.

[tellyworth]

Screenshot showing what the page would look like.

[tellyworth]

Implements the new browse screen only

[tellyworth]

In 13396:

Plugin Directory: add browse view for preview-enabled plugins

Note that the page is unlinked and noindexed, since it is mainly for use by the team and might be removed in future.

Fixes #7534

[codente]

Nice, thank you @tellyworth! I proposed this here https://meta.trac.wordpress.org/ticket/7417
So happy to see this exists now.

Do I leave mine open for the UX part or mark it as a duplicate?

[dd32]

#7417 was marked as a duplicate.