Fixes bgcode handlers registration (#40985)

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## Summary of the Pull Request

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## PR Checklist

- [X] Closes: #30352
- [ ] **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
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- [ ] [WXS for
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for new binaries and localization folder
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- [ ] **Documentation updated:** If checked, please file a pull request
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## Detailed Description of the Pull Request / Additional comments

This is a follow up on #38667 and specifically addresses some of the
comments that GitHub Copilot review pointed out.

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## Validation Steps Performed

(Manual validation only)

src/modules/previewpane/powerpreview/CLSID.h

@@ -66,6 +66,7 @@ const std::vector<std::pair<CLSID, CLSID>> NativeToManagedClsid({
     { CLSID_SHIMActivateMdPreviewHandler, CLSID_MdPreviewHandler },
     { CLSID_SHIMActivatePdfPreviewHandler, CLSID_PdfPreviewHandler },
     { CLSID_SHIMActivateGcodePreviewHandler, CLSID_GcodePreviewHandler },
+    { CLSID_SHIMActivateBgcodePreviewHandler, CLSID_BgcodePreviewHandler },
     { CLSID_SHIMActivateQoiPreviewHandler, CLSID_QoiPreviewHandler },
     { CLSID_SHIMActivateSvgPreviewHandler, CLSID_SvgPreviewHandler },
     { CLSID_SHIMActivateSvgThumbnailProvider, CLSID_SvgThumbnailProvider }

tools/BugReportTool/BugReportTool/RegistryUtils.cpp

@@ -35,6 +35,8 @@ namespace
     { HKEY_CLASSES_ROOT, L".qoi\\shellex\\{E357FCCD-A995-4576-B01F-234630154E96}" },
     { HKEY_CLASSES_ROOT, L".gcode\\shellex\\{8895b1c6-b41f-4c1c-a562-0d564250836f}" },
     { HKEY_CLASSES_ROOT, L".gcode\\shellex\\{E357FCCD-A995-4576-B01F-234630154E96}" },
+    { HKEY_CLASSES_ROOT, L".bgcode\\shellex\\{8895b1c6-b41f-4c1c-a562-0d564250836f}" },
+    { HKEY_CLASSES_ROOT, L".bgcode\\shellex\\{E357FCCD-A995-4576-B01F-234630154E96}" },
     { HKEY_CLASSES_ROOT, L".stl\\shellex\\{E357FCCD-A995-4576-B01F-234630154E96}" }
     };