feat: enhance titleBarOverlay to accept both a boolean and an object

src/ElectronNET.API/API/Entities/BrowserWindowOptions.cs

@@ -1,4 +1,5 @@
-using Newtonsoft.Json;
+using ElectronNET.Converter;
+using Newtonsoft.Json;
 using Newtonsoft.Json.Converters;
 using System.ComponentModel;
 
@@ -219,7 +220,8 @@ namespace ElectronNET.API.Entities
         /// When using a frameless window this can be used to indicate if the
         /// standard control buttons should be shown. Default is false.
         /// </summary>
-        public bool TitleBarOverlay { get; set; }
+        [JsonConverter(typeof(TitleBarOverlayConverter))]
+        public TitleBarOverlay TitleBarOverlay { get; set; }
 
         /// <summary>
         /// Shows the title in the tile bar in full screen mode on macOS for all

src/ElectronNET.API/API/Entities/TitleBarOverlay.cs

@@ -0,0 +1,18 @@
+namespace ElectronNET.API.Entities;
+
+public class TitleBarOverlay
+{
+    private readonly bool? _value;
+
+    private TitleBarOverlay(bool value) => _value = value;
+
+    public string Color { get; set; }
+
+    public double Height { get; set; }
+
+    public string SymbolColor { get; set; }
+
+    public static implicit operator bool?(TitleBarOverlay titleBarOverlay) => titleBarOverlay?._value;
+
+    public static implicit operator TitleBarOverlay(bool value) => new(value);
+}