CmdPal: Improve fuzzy matcher Unicode and emoji robustness (#45275)

## Summary of the Pull Request

Add comprehensive unit tests for emoji, ZWJ sequences, skin tone
modifiers, and UTF-16 edge cases (unpaired surrogates, combining marks,
random garbage). Update matcher logic to skip normalization of lone
surrogates, preventing errors with malformed Unicode. Expand comparison
test data to cover emoji scenarios. Adds regression guards for diacritic
handling and surrogate processing.

Fixes #45246 introduced in #44809.

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## PR Checklist

- [x] Closes: #45246
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issues) -->
- [ ] **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

.github/actions/spell-check/expect.txt

@@ -2180,4 +2180,4 @@ Zoneszonabletester
 Zoomin
 zoomit
 ZOOMITX
-Zorder
+Zorder