Add std::format formatter for ecs::handle

libs/ecs/include/psemek/ecs/handle.hpp

@@ -3,6 +3,7 @@
 #include <psemek/ecs/detail/id.hpp>
 
 #include <iostream>
+#include <format>
 
 namespace psemek::ecs
 {
@@ -46,4 +47,18 @@ namespace std
 		}
 	};
 
+	template <typename Char>
+	struct formatter<::psemek::ecs::handle, Char>
+	{
+		constexpr auto parse(std::format_parse_context & ctx)
+		{
+			return ctx.begin();
+		}
+
+		auto format(::psemek::ecs::handle const & handle, std::format_context & ctx) const
+		{
+			return std::format_to(ctx.out(), "({},{})", handle.id, handle.epoch);
+		}
+	};
+
 }