refactor AI system

src/lib/ecs/system/ai/RepairEvaluator.h

@@ -0,0 +1,11 @@
+#pragma once
+
+class EntityAdmin;
+
+// Picks the nearest damaged friendly within sensor range as the repair target.
+// Scores high when such a target exists.
+class RepairEvaluator
+{
+public:
+    void evaluate(EntityAdmin& admin);
+};