Add WannGLondon's New York Pack 1

[sebamarynissen]

Adds WannGLondon's New York Pack 1.

[memo33]

For buildings without MN variant, I add a MN variant anyway for compatibility. For example:

sc4pac/src/yaml/wannglondon/american-rowhomes.yaml

Lines 5 to 10 in a8124c0

	assets:
	- assetId: "wannglondon-american-rowhomes-1"
	variants:
	- variant: { nightmode: "standard" }
	- variant: { nightmode: "dark" }
	dependencies: [ "simfox:day-and-nite-mod" ]

It's just a minor conflict affecting night scenes only.

[sebamarynissen]

Ah thanks, I'll adapt. I didn't remember how it worked. Maybe that you could metnion it in the documentation somehow?

[memo33]

I've added a note to the documentation in c58509f.