New resource: `Microsoft.Windows/WindowsFeatureList` for Windows Server roles

[Gijsreyn]

Summary of the new feature / enhancement

DSC already ships two DSIM-backed resources, but neither can install Windows Server roles:

• Microsoft.Windows/OptionalFeatureList calls DismEnableFeature internally but does not expose the EnableAll, SourcePaths, or LimitAccess parameters. Without EnableAll, installing a role that has required sub-features (e.g. RDS-RD-Server) fails or produces an incomplete install.
• Microsoft.Windows/FeatureOnDemandList uses a completely different API, targeting mostly Windows 10/11 client "Feature on Demand."

Note

This was a requested feature at the OpenDSC side.

Proposed technical implementation details (optional)

A new Microsoft.Windows/WindowsFeatureList resource backed by DismEnableFeature with full parameter support.