Added some extensions for KeyGroups

Devices/Keyboard/Extensions/KeyGroupExtension.cs

@@ -0,0 +1,46 @@
+using System.Linq;
+using CUE.NET.Devices.Keyboard.Enums;
+using CUE.NET.Devices.Keyboard.Keys;
+
+namespace CUE.NET.Devices.Keyboard.Extensions
+{
+    public static class KeyGroupExtension
+    {
+        public static SimpleKeyGroup ToSimpleKeyGroup(this BaseKeyGroup keyGroup)
+        {
+            SimpleKeyGroup simpleKeyGroup = keyGroup as SimpleKeyGroup;
+            if (simpleKeyGroup == null)
+            {
+                bool wasAttached = keyGroup.Detach();
+                simpleKeyGroup = new SimpleKeyGroup(keyGroup.Keyboard, wasAttached, keyGroup.Keys.ToArray()) { Color = keyGroup.Color };
+            }
+            return simpleKeyGroup;
+        }
+
+        public static SimpleKeyGroup Exclude(this BaseKeyGroup keyGroup, params CorsairKeyboardKeyId[] keyIds)
+        {
+            SimpleKeyGroup simpleKeyGroup = keyGroup.ToSimpleKeyGroup();
+            foreach (CorsairKeyboardKeyId keyId in keyIds)
+                simpleKeyGroup.RemoveKey(keyId);
+            return simpleKeyGroup;
+        }
+
+        public static SimpleKeyGroup Exclude(this BaseKeyGroup keyGroup, params CorsairKey[] keyIds)
+        {
+            SimpleKeyGroup simpleKeyGroup = keyGroup.ToSimpleKeyGroup();
+            foreach (CorsairKey key in keyIds)
+                simpleKeyGroup.RemoveKey(key);
+            return simpleKeyGroup;
+        }
+
+        public static bool Attach(this BaseKeyGroup keyGroup)
+        {
+            return keyGroup.Keyboard?.AttachKeyGroup(keyGroup) ?? false;
+        }
+
+        public static bool Detach(this BaseKeyGroup keyGroup)
+        {
+            return keyGroup.Keyboard?.DetachKeyGroup(keyGroup) ?? false;
+        }
+    }
+}