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/HTMLMetaElement.webidl

@@ -0,0 +1,24 @@
+/* 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://html.spec.whatwg.org/multipage/#htmlmetaelement
+[Exposed=Window]
+interface HTMLMetaElement : HTMLElement {
+  [HTMLConstructor] constructor();
+
+  [CEReactions]
+             attribute DOMString name;
+  [CEReactions]
+          attribute DOMString httpEquiv;
+  [CEReactions]
+             attribute DOMString content;
+
+  // also has obsolete members
+};
+
+// https://html.spec.whatwg.org/multipage/#HTMLMetaElement-partial
+partial interface HTMLMetaElement {
+  // [CEReactions]
+  //         attribute DOMString scheme;
+};