LibWeb: Implement the Gamepad API with SDL3

Author: https://github.com/Lubrsi
Commit: 74e0483ea5
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/5902
Reviewed-by: https://github.com/gmta
Reviewed-by: https://github.com/trflynn89

Libraries/LibWeb/Gamepad/GamepadButton.idl

@@ -0,0 +1,7 @@
+// https://w3c.github.io/gamepad/#dom-gamepadbutton
+[Exposed=Window]
+interface GamepadButton {
+    readonly attribute boolean pressed;
+    readonly attribute boolean touched;
+    readonly attribute double value;
+};