Fixes#2158
- Adds `Organization.listPublicCollections` field and API endpoint to
update it
- Replaces `Collection.isPublic` boolean with `Collection.access`
(values: `private`, `unlisted`, `public`) and add database migration
- Update frontend to use `Collection.access` instead of `isPublic`,
otherwise not changing current behavior
---------
Co-authored-by: sua yoo <sua@suayoo.com>
