Schema draft for WinGet configure

[ryfu-msft]

Related to: #2845

This is a rough draft of the proposed schema that outlines the fields that could be utilized to provide the information necessary for WinGet configure.

Microsoft Reviewers: Open in CodeFlow

[denelon]

@SteveL-MSFT based on some of our internal proposals, @ryfu-msft drafted this JSON schema. We believe this will ultimately best live in a PowerShell DSC GitHub repository in the future, but we would like to iterate here. We will create an https://aka.ms link for the schema so preview users can also try this out, and when the time is right to move this to a PowerShell repository, we can create the PR and adjust the https://aka.ms link.

I've added you as a reviewer since it should follow any prior art with respect to PowerShell naming and idioms.

[ryfu-msft]

This schema is not final and we will continue to iterate on this version for now. Planning to check this in so that people can use it as a reference for building their own configuration yamls.

Checking this in so we can have a basic schema for reference. I removed the unimplemented/unplanned fields and will iterate on this schema as needed.