Move pathfinders to dedicated files

cpp/src/pathfinder/gbfs.hpp

@@ -0,0 +1,26 @@
+#pragma once
+
+#include <string_view>
+#include <unordered_map>
+
+#include "base.hpp"
+
+#include "map.hpp"
+#include "math.hpp"
+
+namespace pathfinder {
+
+class GBFS: public PathFinderBase {
+
+public:
+  GBFS(const Map* m): PathFinderBase(m) {}
+  Path CalculatePath(WorldPos start, WorldPos end) override;
+  const std::string_view& GetName() const override { return m_Name; }
+
+private:
+  static float Heuristic(const TilePos& a, const TilePos& b);
+  const std::string_view m_Name = "Greedy Best First Search";
+  std::unordered_map<TilePos, TilePos, TilePosHash> m_CameFrom;
+};
+
+} // pathfinder namespace