[CI] Fix Win10 New+ build: add local Generated Files include path (#43361)

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fix/what does it change/how was it tested (even manually, if necessary)?
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## Summary of the Pull Request
**The CI frequently fails due to this issue**
<img width="1094" height="139" alt="image"
src="https://github.com/user-attachments/assets/b69aa417-b25c-4396-a863-32e8a31415e9"
/>
<img width="1249" height="183" alt="image"
src="https://github.com/user-attachments/assets/14f57ada-4b3c-4a70-9e6b-17d7162cece4"
/>

**Fix**
make NewPlus.ShellExtension.win10.vcxproj include its own Generated
Files folder so autogenerated resource.h is always found
prevents CI failures when the Win10 module builds before the shared
NewPlus project has produced headers

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## PR Checklist

- [ ] Closes: #xxx
- [ ] **Communication:** I've discussed this with core contributors
already. If the work hasn't been agreed, this work might be rejected
- [ ] **Tests:** Added/updated and all pass
- [ ] **Localization:** All end-user-facing strings can be localized
- [ ] **Dev docs:** Added/updated
- [ ] **New binaries:** Added on the required places
- [ ] [JSON for
signing](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
for new binaries
- [ ] [WXS for
installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs)
for new binaries and localization folder
- [ ] [YML for CI
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
for new test projects
- [ ] [YML for signed
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/release.yml)
- [ ] **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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## 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

src/modules/NewPlus/NewShellExtensionContextMenu.win10/NewPlus.ShellExtension.win10.vcxproj

@@ -46,7 +46,7 @@
       <PreprocessorDefinitions>_DEBUG;NEWPLUSSHELLEXTENSIONWIN10_EXPORTS;_WINDOWS;_USRDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <PrecompiledHeader>Use</PrecompiledHeader>
-      <AdditionalIncludeDirectories>..\..\..\common\Telemetry;..\..\;..\..\..\;%(AdditionalIncludeDirectories);..\NewShellExtensionContextMenu</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\..\..\common\Telemetry;..\..\;..\..\..\;%(AdditionalIncludeDirectories);..\NewShellExtensionContextMenu;$(MSBuildThisFileDirectory)Generated Files</AdditionalIncludeDirectories>
       <CompileAsWinRT>false</CompileAsWinRT>
       <LanguageStandard>stdcpplatest</LanguageStandard>
     </ClCompile>
@@ -67,7 +67,7 @@
       <PreprocessorDefinitions>NDEBUG;NEWPLUSSHELLEXTENSIONWIN10_EXPORTS;_WINDOWS;_USRDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <PrecompiledHeader>Use</PrecompiledHeader>
-      <AdditionalIncludeDirectories>..\..\..\common\Telemetry;..\..\;..\..\..\;%(AdditionalIncludeDirectories);..\NewShellExtensionContextMenu</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\..\..\common\Telemetry;..\..\;..\..\..\;%(AdditionalIncludeDirectories);..\NewShellExtensionContextMenu;$(MSBuildThisFileDirectory)Generated Files</AdditionalIncludeDirectories>
       <CompileAsWinRT>false</CompileAsWinRT>
       <LanguageStandard>stdcpplatest</LanguageStandard>
     </ClCompile>