🚚 engine.h: Extract Point, Direction, clamp

`engine.h` is getting quite bloated. Moves this code to their own files.

Source/automap.cpp

@@ -5,8 +5,6 @@
  */
 #include "automap.h"
 
-#include <algorithm>
-
 #include <fmt/format.h>
 
 #include "control.h"
@@ -17,6 +15,7 @@
 #include "player.h"
 #include "setmaps.h"
 #include "utils/language.h"
+#include "utils/stdcompat/algorithm.hpp"
 #include "utils/ui_fwd.h"
 
 namespace devilution {