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

battle.hpp

@@ -0,0 +1,25 @@
+#pragma once
+#include "rituals.hpp"
+#include "config.hpp"
+#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();
+  };
+}