Creates a new time tracking project. Returns the created project with its ID and tasks. When allowAllEmployees is false, the response also includes the employeeIds array of employees who have access.

By default, all employees can log time to the project (allowAllEmployees defaults to true) and the project is billable (billable defaults to true). Set hasTasks to true to enable task-level tracking and provide a tasks array — at least one task is required when hasTasks is true. Project and task names must be unique and may not exceed 50 characters. When allowAllEmployees is false, provide employeeIds to restrict access to specific employees.