Changes to Get a project template

added the media type application/json for the response with the status 403

added the non-success response with the status 400

added the non-success response with the status 429

added the optional property book_ids to the response with the 200 status

added the optional property books to the response with the 200 status

added the optional property company_wide to the response with the 200 status

added the optional property enforce_sequential_milestones to the response with the 200 status

added the optional property project_milestones/items/auto_complete_tasks to the response with the 200 status

added the required property archived_at to the response with the 200 status