HID SharedMem Rework (#1003)

* Delete old HLE.Input

* Add new HLE Input.

git shows Hid.cs as modified because of the same name. It is new.

* Change HID Service

* Change Ryujinx UI to reflect new Input

* Add basic ControllerApplet

* Add DebugPad

Should fix Kirby Star Allies

* Address Ac_K's comments

* Moved all of HLE.Input to Services.Hid
* Separated all structs and enums each to a file
* Removed vars
* Made some naming changes to align with switchbrew
* Added official joycon colors

As an aside, fixed a mistake in touchscreen headers and added checks to
important SharedMem structs at init time.

* Further address Ac_K's comments

* Addressed gdkchan's and some more Ac_K's comments

* Address AcK's review comments

* Address AcK's second review comments

* Replace missed Marshal.SizeOf and address gdkchan's comments

Ryujinx.HLE/HOS/Services/Hid/HidDevices/MouseDevice.cs

@@ -0,0 +1,37 @@
+namespace Ryujinx.HLE.HOS.Services.Hid
+{
+    public class MouseDevice : BaseDevice
+    {
+        public MouseDevice(Switch device, bool active) : base(device, active) { }
+
+        public void Update(int mouseX, int mouseY, int buttons = 0, int scrollX = 0, int scrollY = 0)
+        {
+            ref ShMemMouse mouse = ref _device.Hid.SharedMemory.Mouse;
+
+            int currentIndex = UpdateEntriesHeader(ref mouse.Header, out int previousIndex);
+
+            if (!Active)
+            {
+                return;
+            }
+
+            ref MouseState currentEntry = ref mouse.Entries[currentIndex];
+            MouseState previousEntry = mouse.Entries[previousIndex];
+
+            currentEntry.SampleTimestamp = previousEntry.SampleTimestamp + 1;
+            currentEntry.SampleTimestamp2 = previousEntry.SampleTimestamp2 + 1;
+
+            currentEntry.Buttons = (ulong)buttons;
+
+            currentEntry.Position = new MousePosition
+            {
+                X = mouseX,
+                Y = mouseY,
+                VelocityX = mouseX - previousEntry.Position.X,
+                VelocityY = mouseY - previousEntry.Position.Y,
+                ScrollVelocityX = scrollX,
+                ScrollVelocityY = scrollY
+            };
+        }
+    }
+}