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/TestBindingProxy.webidl

@@ -0,0 +1,29 @@
+/* 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/. */
+/*
+ * This IDL file was created to test the special operations (see
+ * https://heycam.github.io/webidl/#idl-special-operations) without converting
+ * TestBinding.webidl into a proxy.
+ *
+ */
+
+// This interface is entirely internal to Servo, and should not be accessible to
+// web pages.
+
+[Pref="dom_testbinding_enabled", Exposed=(Window,Worker)]
+interface TestBindingProxy : TestBinding {
+  readonly attribute unsigned long length;
+
+  getter DOMString getNamedItem(DOMString item_name);
+
+  setter undefined setNamedItem(DOMString item_name, DOMString value);
+
+  getter DOMString getItem(unsigned long index);
+
+  setter undefined setItem(unsigned long index, DOMString value);
+
+  deleter undefined removeItem(DOMString name);
+
+  stringifier;
+};