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>

Language/CulturesHelper.cs

@@ -54,12 +54,48 @@ namespace CMM.Language
             var Languages = new List<string>();
             string uriPath = ResourceLocalPath + "/" + LanguageFileName;
 
-            Languages.Add(uriPath + ".en-US.xaml");
-            Languages.Add(uriPath + ".zh-TW.xaml");
+            Languages.Add(uriPath + ".en.xaml");
+            Languages.Add(uriPath + ".es.xaml");
+            Languages.Add(uriPath + ".fr.xaml");
+            Languages.Add(uriPath + ".de.xaml");
+            Languages.Add(uriPath + ".zh.xaml");
+            Languages.Add(uriPath + ".ja.xaml");
+            Languages.Add(uriPath + ".pt.xaml");
+            Languages.Add(uriPath + ".it.xaml");
+            Languages.Add(uriPath + ".hi.xaml");
 
             return Languages;
         }
 
+        /// <summary>
+        /// Auto-detect and apply system language
+        /// </summary>
+        public void ApplySystemLanguage()
+        {
+            var systemCulture = CultureInfo.CurrentUICulture;
+            var matchedCulture = FindBestMatchingCulture(systemCulture);
+            ChangeCulture(matchedCulture);
+        }
+
+        /// <summary>
+        /// Find the best matching supported culture for the given culture
+        /// </summary>
+        private CultureInfo FindBestMatchingCulture(CultureInfo culture)
+        {
+            // Try exact match first
+            var exactMatch = SupportedCultures.FirstOrDefault(c =>
+                c.Name.Equals(culture.Name, StringComparison.OrdinalIgnoreCase));
+            if (exactMatch != null) return exactMatch;
+
+            // Try matching by two-letter ISO language name
+            var languageMatch = SupportedCultures.FirstOrDefault(c =>
+                c.TwoLetterISOLanguageName.Equals(culture.TwoLetterISOLanguageName, StringComparison.OrdinalIgnoreCase));
+            if (languageMatch != null) return languageMatch;
+
+            // Default to English
+            return SupportedCultures.FirstOrDefault(c => c.Name == "en") ?? SupportedCultures.First();
+        }
+
         public void ChangeCulture(string cultureName)
         {
             var cultureInfo = CultureInfo.GetCultureInfo(cultureName);