Add devcontainer & dsc/winget configuration that can be used when building this repo

[kilasuit]

Prerequisites

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Summary

Adding a devcontainer would be useful for anyone that doesn't want to have to install applications like node or other tooling directly on their machines & would also enable development and testing in CodeSpaces or using a Remote Container Host.

Also it would be useful to have a dsc configuration as well as winget configurations for this as well.

Proposed Design

as above

Willing to implement

Yes :-)

[JustinGrote]

Already being worked on here!
https://github.com/PowerShell/vscode-powershell/tree/build/devcontainer

Mostly done, just some challenges with multi-repo support I'm still solving.