feat(ShaderStage): 将基类从CanvasItem改为Node2D并添加类名

feat(LightGun): 添加长度属性和粒子发射控制

refactor(TickTool): 修改millseconds参数类型并添加动画关键帧修改功能

feat(Bear): 添加新攻击类型6并优化攻击5的子弹生成逻辑

scripts/Tools/TickTool.gd

@@ -1,6 +1,6 @@
 class_name TickTool
 
-static func millseconds(ms: int):
+static func millseconds(ms: float):
 	return await WorldManager.tree.create_timer(ms / 1000.0).timeout
 static func frame(count: int = 1):
 	for i in range(count):
@@ -8,3 +8,15 @@ static func frame(count: int = 1):
 static func until(predicate: Callable):
 	while not predicate.call():
 		await frame()
+static func modifyAnimationKey(animator: AnimationPlayer, name: String, track: NodePath, trackType: Animation.TrackType, time: float, value: Variant):
+	var animation = animator.get_animation(name)
+	var trackIdx = animation.find_track(track, trackType)
+	var keyIdx = animation.track_find_key(trackIdx, time)
+	var inHandle
+	var outHandle
+	if trackType == Animation.TrackType.TYPE_BEZIER:
+		inHandle = animation.bezier_track_get_key_in_handle(trackIdx, keyIdx)
+		outHandle = animation.bezier_track_get_key_out_handle(trackIdx, keyIdx)
+		animation.track_set_key_value(trackIdx, keyIdx, [value, inHandle.x, inHandle.y, outHandle.x, outHandle.y])
+	else:
+		animation.track_set_key_value(trackIdx, keyIdx, [value])