Add option to change controller LED color (#572)

This allows the user to change the controller LED while using Ryujinx.
Useful for PS4 and PS5 controllers as an example.

You can also use a spectrum-cycling Rainbow color option, or turn the LED off for DualSense controllers.

---------

Co-authored-by: Evan Husted <greem@greemdev.net>

src/Ryujinx.Common/Configuration/Hid/Controller/LedConfigController.cs

@@ -2,14 +2,24 @@
 {
     public class LedConfigController
     {
-        /// <summary>
-        ///     Packed RGB int of the color
-        /// </summary>
-        public uint LedColor { get; set; }
-
         /// <summary>
         /// Enable LED color changing by the emulator
         /// </summary>
         public bool EnableLed { get; set; }
+        
+        /// <summary>
+        /// Ignores the color and disables the LED entirely.
+        /// </summary>
+        public bool TurnOffLed { get; set; }
+        
+        /// <summary>
+        /// Ignores the color and uses the rainbow color functionality for the LED.
+        /// </summary>
+        public bool UseRainbow { get; set; }
+        
+        /// <summary>
+        ///     Packed RGB int of the color
+        /// </summary>
+        public uint LedColor { get; set; }
     }
 }