update syntax highlighting to use vscode dark mode theme

csharp_mod/Extensions.cs

@@ -118,18 +118,31 @@ public static unsafe class SlangExtensions
     {
         switch (kind)
         {
-            case 1:
-                return SlangFormatter.ColorString; // String
-            case 2:
-                return SlangFormatter.ColorString; // Number
-            case 3:
-                return SlangFormatter.ColorInstruction; // Boolean
-            case 4:
-                return SlangFormatter.ColorSelection; // Keyword
-            case 5:
-                return SlangFormatter.ColorLineNumber; // Identifier
-            case 6:
-                return SlangFormatter.ColorDefault; // Symbol
+            case 1: // Strings
+                return SlangFormatter.ColorString;
+            case 2: // Numbers
+                return SlangFormatter.ColorNumber;
+            case 3: // Booleans
+                return SlangFormatter.ColorBoolean;
+
+            case 4: // (if, else, loop)
+                return SlangFormatter.ColorControl;
+            case 5: // (let, const, device)
+                return SlangFormatter.ColorDeclaration;
+
+            case 6: // (variables)
+                return SlangFormatter.ColorIdentifier;
+            case 7: // (punctuation)
+                return SlangFormatter.ColorDefault;
+
+            case 10: // (syscalls)
+                return SlangFormatter.ColorFunction;
+
+            case 11: // Comparisons
+            case 12: // Math
+            case 13: // Logic
+                return SlangFormatter.ColorOperator;
+
             default:
                 return SlangFormatter.ColorDefault;
         }

csharp_mod/Formatter.cs

@@ -13,8 +13,19 @@ public class SlangFormatter : ICodeFormatter
     private CancellationTokenSource? _lspCancellationToken;
     private object _tokenLock = new();
 
-    public static readonly uint ColorInstruction = ColorFromHTML("#ffff00");
-    public static readonly uint ColorString = ColorFromHTML("#ce9178");
+    // VS Code Dark Theme Palette
+    public static readonly uint ColorControl = ColorFromHTML("#C586C0"); // Pink (if, return, loop)
+    public static readonly uint ColorDeclaration = ColorFromHTML("#569CD6"); // Blue (let, device, fn)
+    public static readonly uint ColorFunction = ColorFromHTML("#DCDCAA"); // Yellow (syscalls)
+    public static readonly uint ColorString = ColorFromHTML("#CE9178"); // Orange
+    public static new readonly uint ColorNumber = ColorFromHTML("#B5CEA8"); // Light Green
+    public static readonly uint ColorBoolean = ColorFromHTML("#569CD6"); // Blue (true/false)
+    public static readonly uint ColorIdentifier = ColorFromHTML("#9CDCFE"); // Light Blue (variables)
+    public static new readonly uint ColorDefault = ColorFromHTML("#D4D4D4"); // White (punctuation ; { } )
+
+    // Operators are often the same color as default text in VS Code Dark,
+    // but having a separate definition lets you tweak it (e.g. make them slightly darker or distinct)
+    public static readonly uint ColorOperator = ColorFromHTML("#D4D4D4");
 
     private HashSet<uint> _linesWithErrors = new();