Initial DSC v3 support for PowerToys (#41132)

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fix/what does it change/how was it tested (even manually, if necessary)?
-->
## Summary of the Pull Request

Tasks checklist
- [X] Implement DSC infra in PowerToys
- [X] Implement Settings DSC resource
  - [X] Implement Get, Set, Test, Export, Schema
  - [X] Generate manifest (DSC resource JSON)
- [X] Added Unit Tests
- [x] Add `NJsonSchema` v11.4.0 to the stream
- [x] Package the manifest files so dsc.exe can discover them
- [x] Add `PowerToys.DSC.exe` to the PATH (maybe?)
- [x] Add `InstallLocation` in the registry key so `winget configue
export` can export the PowerToys DSC resources
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## PR Checklist

- [X] Closes: #37276
- [X] **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
- [X] **Localization:** All end-user-facing strings can be localized
- [x] **Dev docs:** Added/updated
- [x] **New binaries:** Added on the required places
- [x] [JSON for
signing](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
for new binaries
- [x] [WXS for
installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs)
for new binaries and localization folder
- [x] [YML for CI
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
for new test projects
- [x] [YML for signed
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/release.yml)
- [x] **Documentation updated:** If checked, please file a pull request
on [our docs
repo](https://github.com/MicrosoftDocs/windows-uwp/tree/docs/hub/powertoys)
and link it here: #xxx

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or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments

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wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed

---------

Co-authored-by: vanzue <vanzue@outlook.com>
Co-authored-by: Kai Tao (from Dev Box) <kaitao@microsoft.com>
Co-authored-by: Leilei Zhang <leilzh@microsoft.com>

installer/PowerToysSetupVNext/Core.wxs

@@ -9,6 +9,25 @@
           <RegistryValue Type="string" Name="InstallScope" Value="$(var.InstallScope)" />
         </RegistryKey>
       </Component>
+      <?if $(var.PerUser) = "true" ?>
+      <Component Id="powertoys_env_path_user" Bitness="always64">
+        <!-- Anchor registry for component key path -->
+        <RegistryKey Root="$(var.RegistryScope)" Key="Software\Classes\powertoys\components">
+          <RegistryValue Type="string" Name="powertoys_env_path_user" Value="" KeyPath="yes" />
+        </RegistryKey>
+        <!-- Append install folder to current user's PATH -->
+        <Environment Id="AddPowerToysToUserPath" Name="PATH" Action="set" Part="last" System="no" Value="[INSTALLFOLDER]" />
+      </Component>
+      <?else?>
+      <Component Id="powertoys_env_path_machine" Bitness="always64">
+        <!-- Anchor registry for component key path -->
+        <RegistryKey Root="$(var.RegistryScope)" Key="Software\Classes\powertoys\components">
+          <RegistryValue Type="string" Name="powertoys_env_path_machine" Value="" KeyPath="yes" />
+        </RegistryKey>
+        <!-- Append install folder to machine PATH -->
+        <Environment Id="AddPowerToysToMachinePath" Name="PATH" Action="set" Part="last" System="yes" Value="[INSTALLFOLDER]" />
+      </Component>
+      <?endif?>
       <Component Id="powertoys_toast_clsid" Bitness="always64">
         <RemoveFolder Id="Remove_powertoys_toast_clsid" On="uninstall" />
         <RegistryKey Root="$(var.RegistryScope)" Key="Software\Classes\CLSID\{DD5CACDA-7C2E-4997-A62A-04A597B58F76}">
@@ -109,6 +128,11 @@
       <ComponentRef Id="powertoys_exe" />
       <ComponentRef Id="PowerToysStartMenuShortcut" />
       <ComponentRef Id="powertoys_per_machine_comp" />
+  <?if $(var.PerUser) = "true" ?>
+  <ComponentRef Id="powertoys_env_path_user" />
+  <?else?>
+  <ComponentRef Id="powertoys_env_path_machine" />
+  <?endif?>
       <ComponentRef Id="powertoys_toast_clsid" />
       <ComponentRef Id="License_rtf" />
       <ComponentRef Id="Notice_md" />