feat: add support for line items on carts (#326) #343

Job	Run time
Validate on Node 20.x and windows-latest	1m 21s
Validate on Node 22.x and ubuntu-latest	48s
Validate on Node 18.x and ubuntu-latest	48s
Validate on Node 20.x and ubuntu-latest	47s
Validate on Node 22.x and windows-latest	1m 22s
Validate on Node 22.x and macOS-latest	53s
Validate on Node 20.x and macOS-latest	1m 3s
Validate on Node 18.x and windows-latest	1m 27s
Validate on Node 18.x and macOS-latest	1m 1s
docker	33s
release	29s
	10m 32s

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