Content gap: No doc explaining how to create the first Citrix VDA golden image for VDI

[celanthe]

Context

The VDI onboarding docs assume a golden image already exists. There is no article explaining how a new VDI customer creates their first Citrix VDA golden image from scratch on a MacStadium-hosted Mac.

Action needed

Write a golden image bootstrap guide covering: installing macOS, installing Citrix VDA, configuring VDA settings, saving the image via Orka, and distributing to hosts. This is a critical gap for new VDI customers.