This change implements the ability to display a list of remote users
who have liked a post on an individual entry page (collection post).
Key changes include:
- Added a `RemoteLikers []*RemoteUser` field to the `PublicPost` struct in `posts.go`.
- Implemented a new database function `getRemoteLikersForPost(postID string)` in `database.go` to fetch likers by joining `remote_likes` and `remoteusers` tables.
- Modified the `GetPost` function in `database.go` to call `getRemoteLikersForPost` and populate the `RemoteLikers` field.
- Updated the `templates/collection-post.tmpl` template to iterate over `RemoteLikers` and display each user's handle as a link to their profile.