LibWeb: Implement CookieStore::get(name)

Author: https://github.com/IdanHo
Commit: 5545d38d7a
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/5766
Reviewed-by: https://github.com/trflynn89 ✅

Libraries/LibWeb/HTML/Window.cpp

@@ -1130,7 +1130,7 @@ GC::Ref<CookieStore::CookieStore> Window::cookie_store()
 
     // The cookieStore getter steps are to return this’s associated CookieStore.
     if (!m_cookie_store)
-        m_cookie_store = realm.create<CookieStore::CookieStore>(realm);
+        m_cookie_store = realm.create<CookieStore::CookieStore>(realm, page().client());
     return *m_cookie_store;
 }