script: Implement HTMLMarqueeElement type (#43610)

This adds the WebIDl and implementation for the HTMLMarqueeElement type.

The `<marquee>` HTML is now assigned this type.

None of the contained properties or methods are implemented yet.

Testing: Existing WPTs

Signed-off-by: Luke Warlow <lwarlow@igalia.com>

components/script/dom/html/htmlmarqueeelement.rs

@@ -0,0 +1,41 @@
+/* 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/. */
+
+use dom_struct::dom_struct;
+use html5ever::{LocalName, Prefix};
+use js::rust::HandleObject;
+
+use crate::dom::bindings::root::DomRoot;
+use crate::dom::document::Document;
+use crate::dom::html::htmlelement::HTMLElement;
+use crate::dom::node::Node;
+use crate::script_runtime::CanGc;
+
+#[dom_struct]
+pub(crate) struct HTMLMarqueeElement {
+    htmlelement: HTMLElement,
+}
+
+impl HTMLMarqueeElement {
+    fn new_inherited(local_name: LocalName, prefix: Option<Prefix>, document: &Document) -> Self {
+        Self {
+            htmlelement: HTMLElement::new_inherited(local_name, prefix, document),
+        }
+    }
+
+    pub(crate) fn new(
+        local_name: LocalName,
+        prefix: Option<Prefix>,
+        document: &Document,
+        proto: Option<HandleObject>,
+        can_gc: CanGc,
+    ) -> DomRoot<Self> {
+        Node::reflect_node_with_proto(
+            Box::new(Self::new_inherited(local_name, prefix, document)),
+            document,
+            proto,
+            can_gc,
+        )
+    }
+}