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/FileReaderSync.webidl

@@ -0,0 +1,20 @@
+/* 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/FileAPI/#FileReaderSync
+
+[Exposed=Worker]
+interface FileReaderSync {
+  [Throws] constructor();
+  // Synchronously return strings
+
+  [Throws]
+  ArrayBuffer readAsArrayBuffer(Blob blob);
+  [Throws]
+  DOMString readAsBinaryString(Blob blob);
+  [Throws]
+  DOMString readAsText(Blob blob, optional DOMString label);
+  [Throws]
+  DOMString readAsDataURL(Blob blob);
+};