Made an installation of NuGet in a separate script to be able to share
the packages by an environment variable between multiple scripts.
NuGet is needed for both the Windows App SDK and a virtual camera.
Also added a label on top of the scripts about copyright and license.
Change-Id: I11f035d8eb107d2d2c9e2a93f17a935129bb707e
Reviewed-by: Tero Heikkinen <tero.heikkinen@qt.io>
Reviewed-by: Elias Toivola <elias.toivola@qt.io>
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