chore: Add windowButtonVisibility to WindowOptions

Author: lijy91

example/lib/main.dart

@@ -16,6 +16,7 @@ void main() async {
     backgroundColor: Colors.transparent,
     skipTaskbar: false,
     titleBarStyle: TitleBarStyle.hidden,
+    windowButtonVisibility: false,
   );
   windowManager.waitUntilReadyToShow(windowOptions, () async {
     await windowManager.show();

lib/src/window_manager.dart

@@ -126,7 +126,10 @@ class WindowManager {
     }
     if (options?.title != null) await setTitle(options!.title!);
     if (options?.titleBarStyle != null) {
-      await setTitleBarStyle(options!.titleBarStyle!);
+      await setTitleBarStyle(
+        options!.titleBarStyle!,
+        windowButtonVisibility: options.windowButtonVisibility ?? true,
+      );
     }
 
     if (callback != null) {

lib/src/window_options.dart

@@ -15,6 +15,7 @@ class WindowOptions {
     this.skipTaskbar,
     this.title,
     this.titleBarStyle,
+    this.windowButtonVisibility,
   });
 
   final Size? size;
@@ -27,4 +28,5 @@ class WindowOptions {
   final bool? skipTaskbar;
   final String? title;
   final TitleBarStyle? titleBarStyle;
+  final bool? windowButtonVisibility;
 }