chore(gomall/tutorial): save ch11 code after course #253

Job	Run time
compliant	24s
resolve module	5s
lint module (./gomall/common)	1m 11s
lint module (./gomall/app/order)	1m 24s
lint module (./gomall/app/cart)	1m 20s
lint module (./gomall/app/user)	1m 35s
lint module (./gomall/app/product)	1m 21s
lint module (./gomall/app/frontend)	1m 38s
lint module (./gomall/app/email)	1m 24s
lint module (./gomall/app/payment)	1m 23s
lint module (./gomall/app/checkout)	1m 18s
lint module (./bookinfo)	1m 28s
lint module (./open-payment-platform)	1m 19s
lint module (./book-shop)	1m 26s
lint module (./easy_note)	1m 26s
	18m 42s

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