Some PowerToys utilities in DevHome

[dabhattimsft]

Summary of the pull request

This PR brings Hosts File Editor, Registry Preview and Environment Variables editor to DevHome

References and relevant issues

Detailed description of the pull request / Additional comments

This PR adds 3 applications to devhome package. Each of these apps consume nuget produced by PowerToys. This nuget contains the essential functionality and UX. On the DevHome side, the code handles Application, MainWindow, Logging and Telemetry.

Validation steps performed

Manually validated launching these utilities from DevHome, launching these as admin from DevHome, launching them from start menu as user and as admin.

PR checklist

• Closes Add some PowerToys utilities #2072
• Tests added/passed
• Documentation updated

[dkbennett]

Things look good from a Telemetry perspective. Also had offline conversations about it so I won't dirty up this PR with already-provided feedback. The other stuff looks OK but I do have concerns about the adding of apps to Dev Home. @EricJohnson327 should definitely review this PR.

[dkbennett]

Un-approving because the versioning questions and apps being added to DevHome is a significant concern of mine.

Un-approving because the versioning questions and apps being added to DevHome is a significant concern of mine.

[krschau]

@dabhattimsft Please open an issue for this if one does not already exist.

[dkbennett]

Not a fan of the new dependency or apps but I have no concerns with the code changes.

[krschau]

Can you add "Utilities" to the list of tools in https://github.com/microsoft/devhome/blob/main/docs/architecture.md? It doesn't have to link to anything.