Initial public release of the shared-memory skill.

• Share knowledge base content with other users using Ensue shared memory network.
• Manage users and groups for collaborative access.
• Support fine-grained permissions (read, create, update, delete) on namespace patterns.
• Organize content into private, shared, and public namespaces for intuitive access control.
• Grant and revoke access at user, group, or organization level.
• Subscribe to changes on any shared memory key for notifications.
• Command-line workflows for family, team, and project sharing scenarios.