feat(dsc): add ZoomIt settings function data #50551

Summary of the Pull Request

This PR fixes the ZoomIt module of the Microsoft DSC settings resource (Microsoft.PowerToys/ZoomItSettings). ZoomIt stores its settings in the registry (HKCU\Software\Sysinternals\ZoomIt), but the resource mapped ZoomIt to the generic file-based path and read and wrote %LOCALAPPDATA%\Microsoft\PowerToys\ZoomIt\settings.json, a file ZoomIt never reads. As a result get/export returned empty defaults, set reported success without changing anything, and test never detected drift.

The module now reads and writes the settings through PowerToys.ZoomItSettingsInterop (ZoomItSettings.LoadSettingsJson/SaveSettingsJson), the same component the PowerToys Settings app uses, and signals the ZOOMIT_REFRESH_SETTINGS_EVENT so a running ZoomIt instance reloads immediately.

resources:

  - name: Configure ZoomIt

    type: Microsoft.PowerToys/ZoomItSettings

    properties:

      settings:

        properties:

          ToggleKey:

            value: { win: false, ctrl: true, alt: false, shift: true, code: 90, key: Z }

          BreakTimeout: { value: 15 }

        name: ZoomIt

        version: 1.0

PR Checklist

• [x] Closes: #50550
  <!-- - [ ] Closes: #yyy (add separate lines for additional resolved issues) -->


• [ ] Communication: I've discussed this with core contributors already. If the work hasn't been agreed, this work might be rejected


• [x] Tests: Added/updated and all pass (SettingsResourceZoomItModuleTest in PowerToys.DSC.UnitTests: get/export/set/test through an in-memory stand-in for the interop so the tests never touch the registry, the refresh event signal, and a read-only round trip through the real interop)


• [x] Localization: All end-user-facing strings can be localized (no new strings)


• [x] Dev docs: Added/updated (doc/dsc/modules/ZoomIt.md)


• [ ] New binaries: Added on the required places — n/a: no new binaries. PowerToys.DSC.csproj gains a project reference to ZoomItSettingsInterop.vcxproj and generates its C# projection (CsWinRTIncludes), as PowerToys.Settings.csproj does; PowerToys.ZoomItSettingsInterop.dll already ships next to PowerToys.DSC.exe in the installation root
  
  
  • [ ] JSON for signing for new binaries — n/a
    
  
  
  • [ ] WXS for installer for new binaries and localization folder — n/a
    
  
  
  • [ ] YML for CI pipeline for new test projects — n/a: tests were added to the existing PowerToys.DSC.UnitTests project
    
  
  
  • [ ] YML for signed pipeline — n/a
    
  
  
  
  


• [ ] Documentation updated: If checked, please file a pull request on our docs repo and link it here: #xxx
  ## Validation Steps Performed

Built PowerToys.DSC and PowerToys.DSC.UnitTests and ran the full DSC unit-test suite.