feat: initialized template and wrote first gameplay code

modules/wave_survival/weapons/rifle.h

@@ -0,0 +1,26 @@
+#ifndef WEAPONS_RIFLE_H
+#define WEAPONS_RIFLE_H
+
+#include "wave_survival/player_camera.h"
+#include "wave_survival/weapon_base.h"
+class PlayerBody;
+
+class Rifle : public WeaponBase {
+	GDCLASS(Rifle, WeaponBase);
+	static void _bind_methods();
+	void on_primary_fire(bool down);
+	void on_alt_mode(bool alt_mode);
+	void on_animation_changed(String new_anim);
+	void ready();
+	void process(double delta);
+
+public:
+	void _notification(int what);
+
+private:
+	float ads_factor{ 0.5f };
+	bool request_alt_mode{ false };
+	bool in_alt_mode{ false };
+};
+
+#endif // !WEAPONS_RIFLE_H