List action items with optional filters and pagination.
Privileged access allows you to get action items for the account.
Non-privileged access allows you to get action items for the authenticated user only.

The scope filter controls which action items are returned:

• (no scope - default): All action items the user has access to
• assigned_to_me: Only action items assigned to the authenticated user
• assigned_to_others: Only action items the user can edit, assigned to teammates