LibWeb: Add initial CookieStore support

Author: https://github.com/IdanHo
Commit: d6c2893663
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/5766
Reviewed-by: https://github.com/trflynn89 ✅

Libraries/LibWeb/HTML/Window.h

@@ -194,6 +194,7 @@ public:
 
     [[nodiscard]] GC::Ref<Navigator> navigator();
     [[nodiscard]] GC::Ref<CloseWatcherManager> close_watcher_manager();
+    [[nodiscard]] GC::Ref<CookieStore::CookieStore> cookie_store();
 
     void alert(String const& message = {});
     bool confirm(Optional<String> const& message);
@@ -310,6 +311,7 @@ private:
     GC::Ptr<Navigator> m_navigator;
     GC::Ptr<Location> m_location;
     GC::Ptr<CloseWatcherManager> m_close_watcher_manager;
+    GC::Ptr<CookieStore::CookieStore> m_cookie_store;
 
     // https://html.spec.whatwg.org/multipage/nav-history-apis.html#window-navigation-api
     GC::Ptr<Navigation> m_navigation;