Enable PDF files in preview pane (#9088)

## Summary of the Pull Request
This PR enables user to preview PDF files in the Explorer preview pane
and in Outlook. 

**What is this about:**
Windows does not support out of the box experience for previewing PDF
files in the preview pane. Users need to install third-party software
like Adobe Acrobat reader. The PdfPreviewHandler module enbales the user
to preview PDF files.

**How does someone test / validate:** 
Run the installer, open Explorer and select a PDF file, enable the
preview pane. Maybe need to remove third-party PDF software.

## Quality Checklist

- [X] **Linked issue:** #3548
- [ ] **Communication:** I've discussed this with core contributors in the issue. 
- [X] **Tests:** Added/updated and all pass
- [X] **Installer:** Added/updated and all pass
- [X] **Localization:** All end user facing strings can be localized
- [ ] **Docs:** Added/ updated
- [x] **Binaries:** Any new files are added to WXS / YML
   - [ ] No new binaries
   - [x] YML for signing
   - [x] WXS for installer

src/modules/previewpane/powerpreview/powerpreview.cpp

@@ -33,6 +33,14 @@ PowerPreviewModule::PowerPreviewModule() :
         L"Markdown Preview Handler",
         std::make_unique<RegistryWrapper>()));
 
+    m_fileExplorerModules.emplace_back(std::make_unique<PreviewHandlerSettings>(
+        true,
+        L"pdf-previewer-toggle-setting",
+        GET_RESOURCE_STRING(IDS_PREVPANE_PDF_SETTINGS_DESCRIPTION),
+        L"{07665729-6243-4746-95b7-79579308d1b2}",
+        L"PDF Preview Handler",
+        std::make_unique<RegistryWrapper>()));
+
     m_fileExplorerModules.emplace_back(std::make_unique<ThumbnailProviderSettings>(
         true,
         L"svg-thumbnail-toggle-setting",