Move solution and projects to src

src/Ryujinx.Input/GamepadButtonInputId.cs

@@ -0,0 +1,57 @@
+namespace Ryujinx.Input
+{
+    /// <summary>
+    /// Represent a button from a gamepad.
+    /// </summary>
+    public enum GamepadButtonInputId : byte
+    {
+        Unbound,
+        A,
+        B,
+        X,
+        Y,
+        LeftStick,
+        RightStick,
+        LeftShoulder,
+        RightShoulder,
+
+        // Likely axis
+        LeftTrigger,
+        // Likely axis
+        RightTrigger,
+
+        DpadUp,
+        DpadDown,
+        DpadLeft,
+        DpadRight,
+
+        // Special buttons
+
+        Minus,
+        Plus,
+
+        Back = Minus,
+        Start = Plus,
+
+        Guide,
+        Misc1,
+
+        // Xbox Elite paddle
+        Paddle1,
+        Paddle2,
+        Paddle3,
+        Paddle4,
+
+        // PS5 touchpad button
+        Touchpad,
+
+        // Virtual buttons for single joycon
+        SingleLeftTrigger0,
+        SingleRightTrigger0,
+
+        SingleLeftTrigger1,
+        SingleRightTrigger1,
+
+        Count
+    }
+}