Retrieves a list of all projects from TimeCamp. In TimeCamp's API, projects are represented as tasks. This action fetches all tasks and returns only the root-level tasks (those with no parent_id), which represent projects. Note: This API endpoint requires a paid TimeCamp plan. Free plans do not have API access to tasks/projects. Returns project details including: task_id, name, archived status, color, dates, budget information, and assigned users.