dom: Implement ClipboardItem (#36336)

implement the `ClipboardItem` interface

Testing: covered by existing wpt tests

part of #36084

---------

Signed-off-by: Gae24 <96017547+Gae24@users.noreply.github.com>

components/script_bindings/webidls/Clipboard.webidl

@@ -0,0 +1,26 @@
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+// https://w3c.github.io/clipboard-apis/#clipboard-item-interface
+
+typedef Promise<(DOMString or Blob)> ClipboardItemData;
+
+[SecureContext, Exposed=Window, Pref="dom_async_clipboard_enabled"]
+interface ClipboardItem {
+  [Throws] constructor(record<DOMString, ClipboardItemData> items,
+              optional ClipboardItemOptions options = {});
+
+  readonly attribute PresentationStyle presentationStyle;
+  readonly attribute /* FrozenArray<DOMString> */ any types;
+
+  // Promise<Blob> getType(DOMString type);
+
+  // static boolean supports(DOMString type);
+};
+
+enum PresentationStyle { "unspecified", "inline", "attachment" };
+
+dictionary ClipboardItemOptions {
+  PresentationStyle presentationStyle = "unspecified";
+};