Make manager classes singletons and add Display, Tray, Window managers

Author: lijy91

Sources/Example/main.swift

@@ -9,11 +9,9 @@ print()
 // Test basic Display functionality
 print("🚀 Testing NativeAPI Display...")
 
-let accessibilityManager = AccessibilityManager()
+AccessibilityManager.shared.enable()
 
-accessibilityManager.enable()
-
-let isAccessibilityEnabled = accessibilityManager.isEnabled()
+let isAccessibilityEnabled = AccessibilityManager.shared.isEnabled()
 
 print("✅ Accessibility is enabled:", isAccessibilityEnabled)
 

Sources/NativeAPI/AccessibilityManager.swift

@@ -1,9 +1,9 @@
 import CNativeAPI
 
-public class AccessibilityManager {
-    public init() {
-        // Initialize the accessibility manager
-    }
+public class AccessibilityManager: @unchecked Sendable {
+    public static let shared = AccessibilityManager()
+
+    private init() {}
 
     public func enable() {
         native_accessibility_manager_enable()

Sources/NativeAPI/DisplayManager.swift

@@ -0,0 +1,7 @@
+import CNativeAPI
+
+public class DisplayManager: @unchecked Sendable {
+    public static let shared = DisplayManager()
+
+    private init() {}
+}

Sources/NativeAPI/TrayManager.swift

@@ -0,0 +1,7 @@
+import CNativeAPI
+
+public class TrayManager: @unchecked Sendable {
+    public static let shared = TrayManager()
+
+    private init() {}
+}

Sources/NativeAPI/WindowManager.swift

@@ -0,0 +1,7 @@
+import CNativeAPI
+
+public class WindowManager: @unchecked Sendable {
+    public static let shared = WindowManager()
+
+    private init() {}
+}