feat: first basic enemy patrolling behaviour

modules/wave_survival/enemies/enemy_wretched.h

@@ -0,0 +1,45 @@
+#ifndef ENEMY_WRETCHED_H
+#define ENEMY_WRETCHED_H
+
+#include "wave_survival/enemy_body.h"
+#include "wave_survival/state.h"
+class PatrolPath;
+
+class EnemyWretched : public EnemyBody {
+	GDCLASS(EnemyWretched, EnemyBody);
+	static void _bind_methods();
+	void ready();
+
+protected:
+	void _notification(int what);
+};
+
+/* ============================== STATES ============================== */
+
+class WretchedState : public State {
+	GDCLASS(WretchedState, State);
+	static void _bind_methods() {}
+
+public:
+	virtual void set_target(Node *node) override;
+	EnemyWretched *get_target() const;
+
+private:
+	EnemyWretched *target{ nullptr };
+};
+
+class WretchedPatrolState : public WretchedState {
+	GDCLASS(WretchedPatrolState, WretchedState);
+	static void _bind_methods() {}
+
+public:
+	virtual void enter_state() override;
+	virtual void process(double delta) override;
+
+private:
+	NavigationAgent3D *nav{ nullptr };
+	int path_point{ 0 };
+	PatrolPath *path{ nullptr };
+};
+
+#endif // !ENEMY_WRETCHED_H