script: Move code generation and webidl files to new script_bindings crate. (#35157)

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

components/script_bindings/webidls/Gamepad.webidl

@@ -0,0 +1,36 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+// https://w3c.github.io/gamepad/#gamepad-interface
+[Exposed=Window, Pref="dom_gamepad_enabled"]
+interface Gamepad {
+    readonly attribute DOMString id;
+    readonly attribute long index;
+    readonly attribute boolean connected;
+    readonly attribute DOMHighResTimeStamp timestamp;
+    readonly attribute DOMString mapping;
+    readonly attribute Float64Array axes;
+    [SameObject] readonly attribute GamepadButtonList buttons;
+    [SameObject] readonly attribute GamepadHapticActuator vibrationActuator;
+};
+
+// https://w3c.github.io/gamepad/extensions.html#partial-gamepad-interface
+partial interface Gamepad {
+  readonly attribute GamepadHand hand;
+  // readonly attribute FrozenArray<GamepadHapticActuator> hapticActuators;
+  readonly attribute GamepadPose? pose;
+};
+
+// https://w3c.github.io/gamepad/extensions.html#gamepadhand-enum
+enum GamepadHand {
+  "",  /* unknown, both hands, or not applicable */
+  "left",
+  "right"
+};
+
+// https://www.w3.org/TR/gamepad/#extensions-to-the-windoweventhandlers-interface-mixin
+partial interface mixin WindowEventHandlers {
+  attribute EventHandler ongamepadconnected;
+  attribute EventHandler ongamepaddisconnected;
+};