More file split

coord.h

@@ -0,0 +1,11 @@
+#pragma once
+
+#include <cstdint>
+#include <ostream>
+
+struct Coord {
+  uint32_t x;
+  uint32_t y;
+};
+
+std::ostream& operator<<(std::ostream& os, const Coord& coord);