Add screen (brightness) control

Sources/Control/Screen.swift

@@ -0,0 +1,48 @@
+//
+//  Screen.swift
+//  ControlKit
+//
+
+import UIKit
+
+public extension Control {
+
+    /// 🔆 Control the device's screen's brightness.
+    @MainActor
+    enum Screen {
+
+        public static var isKeptAwake: Bool {
+            get {
+                UIApplication.shared.isIdleTimerDisabled
+            }
+            set {
+                UIApplication.shared.isIdleTimerDisabled = newValue
+            }
+        }
+
+        public static var brightness: CGFloat {
+            get {
+                UIScreen.main.brightness
+            }
+            set {
+                UIScreen.main.brightness = min(max(newValue, 0.0), 1.0)
+            }
+        }
+
+        public static var isDimmed: Bool {
+            get {
+                brightness == 0
+            }
+            set {
+                if newValue {
+                    dimScreenValue = brightness
+                    brightness = 0
+                } else {
+                    brightness = dimScreenValue
+                }
+            }
+        }
+
+        private static var dimScreenValue: CGFloat = 0
+    }
+}