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/XRHand.webidl

@@ -0,0 +1,48 @@
+/* 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/. */
+
+// skip-unless CARGO_FEATURE_WEBXR
+
+// https://github.com/immersive-web/webxr-hands-input/blob/master/explainer.md
+
+enum XRHandJoint {
+    "wrist",
+
+    "thumb-metacarpal",
+    "thumb-phalanx-proximal",
+    "thumb-phalanx-distal",
+    "thumb-tip",
+
+    "index-finger-metacarpal",
+    "index-finger-phalanx-proximal",
+    "index-finger-phalanx-intermediate",
+    "index-finger-phalanx-distal",
+    "index-finger-tip",
+
+    "middle-finger-metacarpal",
+    "middle-finger-phalanx-proximal",
+    "middle-finger-phalanx-intermediate",
+    "middle-finger-phalanx-distal",
+    "middle-finger-tip",
+
+    "ring-finger-metacarpal",
+    "ring-finger-phalanx-proximal",
+    "ring-finger-phalanx-intermediate",
+    "ring-finger-phalanx-distal",
+    "ring-finger-tip",
+
+    "pinky-finger-metacarpal",
+    "pinky-finger-phalanx-proximal",
+    "pinky-finger-phalanx-intermediate",
+    "pinky-finger-phalanx-distal",
+    "pinky-finger-tip"
+};
+
+[SecureContext, Exposed=Window, Pref="dom_webxr_hands_enabled"]
+interface XRHand {
+    iterable<XRHandJoint, XRJointSpace>;
+
+    readonly attribute unsigned long size;
+    XRJointSpace get(XRHandJoint key);
+};