refactor(子弹系统): 将子弹前进逻辑提取到PresetsAI类中

将多个子弹类型的forward调用统一到PresetsAI类中，提高代码复用性
删除LockLauncher.gd文件及部分场景文件中冗余的fields配置

scripts/Contents/Bullets/Common/LockLauncher.gd

@@ -1,16 +0,0 @@
-extends BulletBase
-class_name LockLauncher
-
-enum PositionType {
-	SELF,
-	TEXTURE,
-}
-
-@export var target: PositionType = PositionType.SELF
-
-func ai():
-	if target == PositionType.SELF:
-		position = launcher.position
-	else:
-		position = launcher.texture.global_position
-	rotation = launcher.rotation

scripts/Contents/Bullets/Diamond.gd

@@ -8,4 +8,4 @@ func register():
 func ai():
 	rotation = lerp_angle(rotation, position.angle_to_point(launcher.currentFocusedBoss.position), 0.1 * clamp((traceTime - timeLived()) / traceTime, 0, INF))
 	canDamageSelf = !(timeLived() >= traceTime)
-	forward(Vector2.from_angle(rotation))
+	PresetsAI.forward(self, rotation)

scripts/Contents/Bullets/FireScan.gd

@@ -6,4 +6,4 @@ func register():
 	damage = 20
 
 func ai():
-	forward(Vector2.from_angle(rotation))
+	PresetsAI.forward(self, rotation)

scripts/Contents/Bullets/Presets/Presets.gd

@@ -0,0 +1,4 @@
+class_name PresetsAI
+
+static func forward(bullet: BulletBase, rotation: float):
+	bullet.forward(Vector2.from_angle(rotation))

scripts/Contents/Bullets/PurpleCrystal.gd

@@ -2,4 +2,4 @@ extends BulletBase
 class_name PurpleCrystal
 
 func ai():
-	forward(Vector2.from_angle(rotation))
+	PresetsAI.forward(self, rotation)

scripts/Contents/Bullets/Star.gd

@@ -4,4 +4,4 @@ class_name Star
 func register():
 	damage = 1
 func ai():
-	forward(Vector2.from_angle(rotation))
+	PresetsAI.forward(self, rotation)