Mission control: Transforming the Confluence admin experience

Introduces 'Confluence Mission Control' for Premium and Enterprise plans, a dedicated workspace for product admins to manage site-level alerts, insights, and actions. Key features include engagement metrics, external access management, beta feature visibility, Confluence admin awareness, and alert banners. It also provides streamlined content management insights for assessing stale content, planning new content based on search activity, identifying inactive page owners, and uncovering popular search terms. Space-level Mission Control is also now available for space admins.