Migrate ImageResizer to WinUI3 (#45288)

<!-- 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
Migrate WPF/WinForms utility to WinUI3 can give us many benefit.
1. Only WinUI3 support AOT. By this change, we can remove the blocker to
make imageResizer publish with AOT enabled to improve the performance.
Through the previous testing in CmdPal, it can improve about 1.5x to 3x
perf.
2. WinUI 3 provides a modern UI and makes sure that our experiences fit
in with the Windows 11 look and feel.
3. We can merge many redundant code to the same one and reduce more
codebase and installed size in the future if we successfully migrate all
remaining WPF/WinForms utility to WinUI3.


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## PR Checklist

- [x] Closes: #46465
<!-- - [ ] 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
- [x] **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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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
1. Set up the ImageResizer as the startup project.
2. Start in visual studio.

---------

Co-authored-by: Yu Leng (from Dev Box) <yuleng@microsoft.com>
Co-authored-by: Niels Laute <niels.laute@live.nl>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

installer/PowerToysSetupVNext/generateAllFileComponents.ps1

@@ -131,7 +131,25 @@ if ($platform -ceq "arm64") {
 }
 
 #BaseApplications
+# WORKAROUND: Exclude ImageResizer files that leak into the root output directory.
+# ImageResizerCLI (Exe, SelfContained) has a ProjectReference to ImageResizerUI (WinExe, SelfContained).
+# MSBuild copies the referenced WinExe's apphost (.exe, .deps.json, .runtimeconfig.json) to the root
+# output directory as a side effect. These files are incomplete (missing the managed .dll) and should
+# not be included in the installer. The complete ImageResizer files are in WinUI3Apps/ and are handled
+# by WinUI3ApplicationsFiles. TODO: Refactor ImageResizer to use a shared Library project instead.
 Generate-FileList -fileDepsJson "" -fileListName BaseApplicationsFiles -wxsFilePath $PSScriptRoot\BaseApplications.wxs -depsPath "$PSScriptRoot..\..\..\$platform\Release"
+
+# Remove leaked ImageResizer artifacts from BaseApplications
+$baseAppWxsPath = "$PSScriptRoot\BaseApplications.wxs"
+$baseAppWxs = Get-Content $baseAppWxsPath -Raw
+$baseAppWxs = $baseAppWxs -replace 'PowerToys\.ImageResizer\.exe;?', ''
+$baseAppWxs = $baseAppWxs -replace 'PowerToys\.ImageResizer\.deps\.json;?', ''
+$baseAppWxs = $baseAppWxs -replace 'PowerToys\.ImageResizer\.runtimeconfig\.json;?', ''
+# Clean up trailing/double semicolons left after removal
+$baseAppWxs = $baseAppWxs -replace ';;+', ';'
+$baseAppWxs = $baseAppWxs -replace '=;', '='
+$baseAppWxs = $baseAppWxs -replace ';"', '"'
+Set-Content -Path $baseAppWxsPath -Value $baseAppWxs
 Generate-FileComponents -fileListName "BaseApplicationsFiles" -wxsFilePath $PSScriptRoot\BaseApplications.wxs
 
 #WinUI3Applications