LibWeb/CSS: Implement "fetch a style resource" algorithm

Author: https://github.com/AtkinsSJ
Commit: ae943965dc
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2998

Libraries/LibWeb/CSS/Fetch.h

@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2024, Sam Atkins <sam@ladybird.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/String.h>
+#include <LibWeb/Fetch/Infrastructure/FetchAlgorithms.h>
+#include <LibWeb/Fetch/Infrastructure/HTTP/Requests.h>
+
+namespace Web::CSS {
+
+enum class CorsMode {
+    NoCors,
+    Cors,
+};
+
+// https://drafts.csswg.org/css-values-4/#fetch-a-style-resource
+void fetch_a_style_resource(String const& url, CSSStyleSheet const&, Fetch::Infrastructure::Request::Destination, CorsMode, Fetch::Infrastructure::FetchAlgorithms::ProcessResponseConsumeBodyFunction process_response);
+
+}