Add brightness/contrast sliders, input source switching, and 9-language localization

- Add VCP commands for brightness (10), contrast (12), input source (60)
- Fix UTF-16 encoding for monitor data parsing
- Add system tray app with monitor controls
- Add localization for en, es, fr, de, zh, ja, pt, it, hi
- Update to .NET 9.0
- Add LICENSE and README

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

DellMonitorControl/DellMonitorControl.csproj

@@ -2,7 +2,7 @@
 
 	<PropertyGroup>
 		<OutputType>WinExe</OutputType>
-		<TargetFramework>net7.0-windows</TargetFramework>
+		<TargetFramework>net9.0-windows</TargetFramework>
 		<Nullable>enable</Nullable>
 		<AssemblyName>DellMonitorControl</AssemblyName>
 		<RootNamespace>DellMonitorControl</RootNamespace>
@@ -45,6 +45,7 @@
 
 	<ItemGroup>
 	  <ProjectReference Include="..\Library\Library.csproj" />
+	  <ProjectReference Include="..\Language\Language.csproj" />
 	</ItemGroup>
 
 </Project>