[UI Tests] Peek - fix UI tests via setting hotkeys back to Ctrl+Space combo for tests only (#43168)

This pull request introduces a static initialization step to the
`PeekFilePreviewTests` class to ensure the correct test settings are
present before tests run. The main change is the addition of a static
constructor that creates or updates the `settings.json` file with
predefined settings, including setting the activation shortcut to
Ctrl+Space.

Test setup improvements:

* Added a static constructor to `PeekFilePreviewTests` that calls a new
`FixSettingsFileBeforeTests` method, ensuring the necessary settings
file exists and is properly configured before any tests execute.
* Implemented `FixSettingsFileBeforeTests` to create the required
directory and write a `settings.json` file with specific test
configuration, including setting the activation shortcut to Ctrl+Space
and other test-relevant properties.

src/common/UITestAutomation/UITestAutomation.csproj

@@ -8,7 +8,7 @@
     <Nullable>enable</Nullable>
     <PublishAot>true</PublishAot>
     <InvariantGlobalization>true</InvariantGlobalization>
-    <TargetFramework>net9.0-windows10.0.22621.0</TargetFramework>
+    <TargetFramework>net9.0-windows10.0.26100.0</TargetFramework>
     <UseWindowsForms>true</UseWindowsForms>
     <PublishTrimmed>false</PublishTrimmed>
   </PropertyGroup>
@@ -21,4 +21,8 @@
     <PackageReference Include="CoenM.ImageSharp.ImageHash" />
   </ItemGroup>
 
+  <ItemGroup>
+    <ProjectReference Include="..\..\settings-ui\Settings.UI.Library\Settings.UI.Library.csproj" />
+  </ItemGroup>
+
 </Project>