[Feature]: Public collection improvements

[tw4l]

Context

Now that we have public collections, users may want to direct people to a listing of the public collections that are available to view. This could include the name, description, and a link to each, and would help discoverability of the collections that have been made public, which are otherwise only discoverable if you already have the URL.

Requirements

• Anyone can view a list public collections in an org
  • List page (publicly accessible with a link) of collections with thumbnail images that an org has made public
  • Org page is only public if explicitly enabled in the org settings or on signup
  • Clicking on each thumbnail directs users into a full page ReplayWebpage viewer for that collection where they can then view highlighted pages
• Collections can be made public if the org has chosen to be listed as public
  • If an org has chosen to hide themselves from public view, collections can only be private or unlisted
• Anyone can view an individual public collection
• Public collections can be downloaded

Tasks

• Public org home page #2156
• Add collection configuration to make collection public #2157
• API updates for public collections #2158
• Public API endpoint for getting org's collections #2173

[SuaYoo]

@tw4l We'll also need an endpoint for retrieving public collections for an org by slug without revealing the existence of the org. The response will need to include the list of public collections and the org name. Updated the task list!