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>

Library/ViewModel/XMonitorStatus.cs

@@ -2,6 +2,11 @@
 
 namespace CMM.Library.ViewModel
 {
+    public record InputSourceOption(int Value, string Name)
+    {
+        public override string ToString() => Name;
+    }
+
     public class XMonitorStatus : PropertyBase
     {
         public string VCP_Code