Fix package identity build issue (#43019)

<!-- Enter a brief description/summary of your PR here. What does it
fix/what does it change/how was it tested (even manually, if necessary)?
-->
## Summary of the Pull Request
<img width="1988" height="360" alt="image"
src="https://github.com/user-attachments/assets/85d994a9-3799-4f16-a836-85ca264b873c"
/>

Add an EntryPoint to the AppxManifest to fix the issue.
<!-- Please review the items on the PR checklist before submitting-->
## 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

<!-- Provide a more detailed description of the PR, other things fixed,
or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments

<!-- Describe how you validated the behavior. Add automated tests
wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed

src/PackageIdentity/AppxManifest.xml

@@ -36,7 +36,7 @@
   </Capabilities>
 
   <Applications>
-    <Application Id="PowerToys.OCR" Executable="PowerToys.PowerOCR.exe" uap10:TrustLevel="mediumIL" uap10:RuntimeBehavior="win32App">
+    <Application Id="PowerToys.OCR" Executable="PowerToys.PowerOCR.exe" EntryPoint="Windows.FullTrustApplication">
       <uap:VisualElements
         DisplayName="PowerToys.OCR"
         Description="PowerToys OCR Module"
@@ -45,7 +45,7 @@
         Square44x44Logo="Images\Square44x44Logo.png">
       </uap:VisualElements>
     </Application>
-    <Application Id="PowerToys.SettingsUI" Executable="PowerToys.Settings.exe" uap10:TrustLevel="mediumIL" uap10:RuntimeBehavior="win32App">
+    <Application Id="PowerToys.SettingsUI" Executable="WinUI3Apps\PowerToys.Settings.exe" EntryPoint="Windows.FullTrustApplication">
       <uap:VisualElements
         DisplayName="PowerToys.SettingsUI"
         Description="PowerToys Settings UI"
@@ -54,7 +54,7 @@
         Square44x44Logo="Images\Square44x44Logo.png">
       </uap:VisualElements>
     </Application>
-    <Application Id="PowerToys.ImageResizerUI" Executable="WinUI3Apps\PowerToys.ImageResizer.exe" uap10:TrustLevel="mediumIL" uap10:RuntimeBehavior="win32App">
+    <Application Id="PowerToys.ImageResizerUI" Executable="WinUI3Apps\PowerToys.ImageResizer.exe" EntryPoint="Windows.FullTrustApplication">
       <uap:VisualElements
         DisplayName="PowerToys.ImageResizer"
         Description="PowerToys Image Resizer UI"

src/PackageIdentity/PackageIdentity.vcxproj

@@ -17,7 +17,7 @@
       <CIBuildParam Condition="'$(CIBuild)' != 'true'"></CIBuildParam>
     </PropertyGroup>
     
-  <Exec Command="powershell -NonInteractive -ExecutionPolicy Bypass -File &quot;$(MSBuildThisFileDirectory)BuildSparsePackage.ps1&quot; -Platform $(Platform) -Configuration $(Configuration) $(NoSignParam) $(CIBuildParam)" 
+  <Exec Command="pwsh -NonInteractive -ExecutionPolicy Bypass -File &quot;$(MSBuildThisFileDirectory)BuildSparsePackage.ps1&quot; -Platform $(Platform) -Configuration $(Configuration) $(NoSignParam) $(CIBuildParam)" 
           ContinueOnError="false"
           WorkingDirectory="$(MSBuildThisFileDirectory)" />
   </Target>