feat: ported old code and started working on ghost impl

src/Entities/Entity.h

@@ -0,0 +1,20 @@
+#include "../Util/PositionVector.h"
+
+#ifndef ENTITY_H
+#define ENTITY_H
+
+namespace game
+{
+    class Maze;
+    class Entity {
+        private:
+            PositionVector pos;
+            char display_character;
+        public:
+            Entity(PositionVector starting_position, char display_character);
+            void move(const Maze& maze, const PositionVector& player_position);
+            bool is_at_position(const PositionVector& position) const;
+    };
+} // game
+
+#endif //ENTITY_H