[ox/std] Replace ox::ignore with std::ignore

deps/ox/src/ox/std/ignore.hpp

@@ -4,10 +4,17 @@
 
 #pragma once
 
-namespace ox {
+#if __has_include(<tuple>)
+
+#include <tuple>
+
+#else
+
+namespace std {
 
 inline constexpr struct {
 	constexpr void operator=(auto&&) const noexcept {}
 } ignore;
 
-}
+}
+#endif