[FEATURE] Separate @tagging of users from posts

[TekkadanPlays]

This small feature request, I am not sure if anyone has discussed yet. Some topics seem a lot harder to pinpoint historical conversation- but what I am looking for is a way to tag multiple users in any kind-1 event, as a separate event. We often share content directly, it's easy to pull users into threads and mostly tagging other npubs in a comment is not such a big deal. But, I think it would stand to benefit clients to adopt an additional area for users to tag each other as 'pings'. For instance, if I write an article and publish it to my relays, it will inevitably be buried in everyone's personal feed. Often we tag others users to ensure they see information. But, this repeated action inevitably just clutters the comment sections on more trending posts. You can imagine, the more a posts trends, the more people will want to tag their friends to see the same content. Is there any NIP that has attempted to separate this, for visual benefit?

Of course we wouldn't be changing anything in regards to tagging a user within a note. This would still be fully functional. It would merely offer a secondary way to ping other users once an event has been created, without creating another kind-1 event simply to tag user(s).

Example:

This adds a new function, allowing users to quickly tag other users, without leaving a public kind-1 event. It would highlight purple when a user's npub is tagged in that post.