Can someone make a plugin to add a option to a post so that members+ can choose if their post is resolved or not?

Other "minor" details:
If post is resolved, the prefix Resolved will be added, but if it's unresolved no prefix is added.
Controls which forums can mark posts as Resolved/Unresolved.
The Resolved prefix is added in forum view and thread view (i.e. when you're in a forum with the list of topics available and when you view a specific thread).