Support array for Microsoft.Windows/Registry resource

[Gijsreyn]

PR Summary

The Microsoft.Windows/Registry resource now accepts a registryKeys array wrapper (mirroring the Microsoft.Windows/UpdateList pattern), so a single invocation can manage multiple registry entries.

Shouldn't be a breaking change as both input shapes are supported

PR Context

[Copilot]

Pull request overview

This PR extends the Microsoft.Windows/Registry resource’s config input schema to support a registryKeys array wrapper (similar to the Microsoft.Windows/UpdateList pattern), enabling a single invocation to manage multiple registry keys/values while still supporting the existing single-item input shape.

Changes:

• Introduced RegistryKey / RegistryList types and an untagged Registry input enum to support both single and wrapper shapes.
• Updated the Registry resource CLI (registry config get|set|delete) to parse and process multiple items.
• Added Pester coverage for multi-item get/set/delete/what-if flows, and updated dependent code (sshdconfig) for renamed types.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
resources/sshdconfig/src/get.rs	Updates registry helper output type usage from Registry to RegistryKey.
resources/registry/src/main.rs	Adds wrapper parsing/emission and loops operations over multiple registry items.
lib/dsc-lib-registry/src/lib.rs	Refactors helper to operate on RegistryKey and adds new_from_key.
lib/dsc-lib-registry/src/config.rs	Introduces RegistryKey, RegistryList, and untagged Registry to support both input shapes.
resources/registry/tests/registry.config.whatif.tests.ps1	Adds what-if coverage for multi-item wrapper input.
resources/registry/tests/registry.config.set.tests.ps1	Adds set/delete coverage for multi-item wrapper input and cleanup.
resources/registry/tests/registry.config.get.tests.ps1	Adds get coverage for multi-item wrapper input and missing-item behavior.