应用: 淘宝
任务: 打开淘宝,从淘宝首页，进入天猫超市，搜索“蒙牛牛奶”，加入购物车
操作步骤:
step_id: 0
action: CLICK
step_id: 1
action: CLICK
step_id: 2
action: CLICK
step_id: 3
action: CLICK
step_id: 4
action: TYPE
type_text: 蒙牛牛奶
step_id: 5
action: CLICK
step_id: 6
action: CLICK
step_id: 7
action: CLICK
step_id: 8
action: STOP