When creating an NostrEvent with an nevent1 mention, don't include the nevent mentions in the event's tags. This matches the behavior for note1 mentions. Tests for content with npub1 and note1 mentions were added to confirm tag generation behavior. Test for nevent mention tag generation was modified to be the same as note1. Closes: https://github.com/damus-io/damus/issues/1941 Lightning-address: kernelkind@getalby.com Signed-off-by: kernelkind <kernelkind@gmail.com> Reviewed-by: William Casarin <jb55@jb55.com> Signed-off-by: William Casarin <jb55@jb55.com>