build: add EnTT library

include/entt/stl/algorithm.hpp

@@ -0,0 +1,22 @@
+#ifndef ENTT_STL_ALGORITHM_HPP
+#define ENTT_STL_ALGORITHM_HPP
+
+/*! @cond ENTT_INTERNAL */
+#if __has_include(<entt/ext/stl/algorithm.hpp>)
+#    include <entt/ext/stl/algorithm.hpp>
+#else
+#    include <algorithm>
+
+namespace entt::stl {
+
+using std::all_of;
+using std::any_of;
+using std::find_if;
+using std::none_of;
+using std::sort;
+
+} // namespace entt::stl
+#endif
+/*! @endcond */
+
+#endif