Rework the source so that battle is in its own thing to work on.

rituals.hpp

@@ -2,29 +2,10 @@
 #include "goap.hpp"
 #include "ai.hpp"
 #include "config.hpp"
-#include <functional>
 #include "dinkyecs.hpp"
-#include <optional>
 #include "components.hpp"
 
 namespace combat {
-
-  struct BattleAction {
-    DinkyECS::Entity entity;
-    ai::EntityAI &ai;
-    components::Combat &combat;
-  };
-
-  struct BattleEngine {
-    std::unordered_map<DinkyECS::Entity, BattleAction> combatants;
-    std::vector<BattleAction> pending_actions;
-
-    void add_enemy(BattleAction ba);
-    bool plan();
-    std::optional<BattleAction> next();
-    void dump();
-  };
-
   struct RitualAI {
     std::string script;
     ai::State start;