Add audio effect and implement FireScan bullet behavior

- Added Rip.wav audio effect to the project.
- Created FireScan bullet script with speed and damage properties.
- Implemented basic AI movement for FireScan bullets.
- Introduced Wave class for managing enemy waves with dynamic counts and spawning logic.

scripts/Contents/Wave.gd

@@ -0,0 +1,48 @@
+class_name Wave
+
+var entity: PackedScene
+var minCount: int = 1
+var maxCount: int = 1
+var isBoss: bool = false
+var from: float = 0
+var to: float = 0
+var per: int = 0
+
+static var current: int = 0
+static var countBoost: float = 0.1 # 每波增加的敌人数量百分比，指数级
+static var data: Array[Wave] = [
+	# entity, minCount, maxCount, isBoss, from, to, per
+	create(preload("res://components/Characters/Hen.tscn"), 1, 5, false, 0, INF, 1)
+]
+
+static func create(
+		entity_: PackedScene,
+		minCount_: int = 1,
+		maxCount_: int = 1,
+		isBoss_: bool = false,
+		from_: float = 0,
+		to_: float = 0,
+		per_: int = 0
+	) -> Wave:
+	var wave = Wave.new()
+	wave.entity = entity_
+	wave.minCount = minCount_
+	wave.maxCount = maxCount_
+	wave.isBoss = isBoss_
+	wave.from = from_
+	wave.to = to_
+	wave.per = per_
+	return wave
+static func entityCountOf(wave: Wave) -> int:
+	if wave.from <= current and wave.to >= current and int(current - wave.from) % wave.per == 0:
+		print("abc")
+		return randi_range(int(wave.minCount), int(wave.maxCount * ((1 + countBoost) ** current)))
+	return 0
+static func spawn():
+	for i in range(len(data)):
+		var wave = data[i]
+		for j in range(entityCountOf(wave)):
+			EntityBase.generate(wave.entity, MathTool.randv2_range(500), true, wave.isBoss)
+static func next():
+	spawn()
+	current += 1