[Fix][CmdPal] CmdPal Apps extension is missing all Win32 applications (#40392)

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## Summary of the Pull Request
### Root Cause
Calling `"CreateFile"` without an explicit `EntryPoint` fails because
kernel32.dll only exports `CreateFileA` and `CreateFileW`.

### Fix
Add EntryPoint = "CreateFileW"

### How to reproduce
The issue is reproducible when the PC is set to Chinese or another
non-English language.

![image](https://github.com/user-attachments/assets/2bdfd644-3ccf-4ad0-a470-2bd7de29049c)

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## PR Checklist

- [x] **Closes:** #40389, #40340 #40388 #40378 #40341
- [ ] **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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## Validation Steps Performed

src/common/ManagedCsWin32/Kernel32.cs

@@ -21,7 +21,7 @@ public static partial class Kernel32
         out int pBytesReturned,
         IntPtr lpOverlapped);
 
-    [LibraryImport("kernel32.dll", SetLastError = true, StringMarshalling = StringMarshalling.Utf16)]
+    [LibraryImport("kernel32.dll", SetLastError = true, StringMarshalling = StringMarshalling.Utf16, EntryPoint = "CreateFileW")]
     public static partial int CreateFile(
         string lpFileName,
         FileAccessType dwDesiredAccess,