feat(角色): 为熊角色添加阶段转换功能

添加阶段转换系统，当熊的生命值低于50%时进入第二阶段
- 添加mask精灵用于阶段变化视觉效果
- 实现enterStage和exitStage方法处理阶段转换
- 添加stageAnimator处理转换动画
- 调整攻击7的音效播放位置

components/Abstracts/EntityBase.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=36 format=3 uid="uid://cvogxi7mktumf"]
+[gd_scene load_steps=40 format=3 uid="uid://cvogxi7mktumf"]
 
 [ext_resource type="Script" path="res://scripts/Statemachine/EntityBase.gd" id="1_mvol6"]
 [ext_resource type="Texture2D" uid="uid://dwwpkn4q07ja2" path="res://icon.svg" id="2_7lpu0"]
@@ -169,6 +169,123 @@ _data = {
 "hurt": SubResource("Animation_wl2we")
 }
 
+[sub_resource type="Animation" id="Animation_n7kxn"]
+length = 0.001
+tracks/0/type = "bezier"
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/path = NodePath(".:scale:x")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/keys = {
+"handle_modes": PackedInt32Array(0),
+"points": PackedFloat32Array(1, -0.25, 0, 0.25, 0),
+"times": PackedFloat32Array(0)
+}
+tracks/1/type = "bezier"
+tracks/1/imported = false
+tracks/1/enabled = true
+tracks/1/path = NodePath(".:scale:y")
+tracks/1/interp = 1
+tracks/1/loop_wrap = true
+tracks/1/keys = {
+"handle_modes": PackedInt32Array(0),
+"points": PackedFloat32Array(1, -0.25, 0, 0.25, 0),
+"times": PackedFloat32Array(0)
+}
+tracks/2/type = "bezier"
+tracks/2/imported = false
+tracks/2/enabled = true
+tracks/2/path = NodePath(".:modulate:a")
+tracks/2/interp = 1
+tracks/2/loop_wrap = true
+tracks/2/keys = {
+"handle_modes": PackedInt32Array(0),
+"points": PackedFloat32Array(1, -0.25, 0, 0.25, 0),
+"times": PackedFloat32Array(0)
+}
+
+[sub_resource type="Animation" id="Animation_lg0kn"]
+resource_name = "exit"
+step = 0.1
+tracks/0/type = "bezier"
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/path = NodePath(".:scale:x")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/keys = {
+"handle_modes": PackedInt32Array(0, 0),
+"points": PackedFloat32Array(2, -0.25, 0, 0.25, 0, 1, -0.25, 0, 0.25, 0),
+"times": PackedFloat32Array(0, 1)
+}
+tracks/1/type = "bezier"
+tracks/1/imported = false
+tracks/1/enabled = true
+tracks/1/path = NodePath(".:scale:y")
+tracks/1/interp = 1
+tracks/1/loop_wrap = true
+tracks/1/keys = {
+"handle_modes": PackedInt32Array(0, 0),
+"points": PackedFloat32Array(0, -0.25, 0, 0.25, 0, 1, -0.25, 0, 0.25, 0),
+"times": PackedFloat32Array(0, 1)
+}
+tracks/2/type = "bezier"
+tracks/2/imported = false
+tracks/2/enabled = true
+tracks/2/path = NodePath(".:modulate:a")
+tracks/2/interp = 1
+tracks/2/loop_wrap = true
+tracks/2/keys = {
+"handle_modes": PackedInt32Array(0, 0),
+"points": PackedFloat32Array(0, -0.25, 0, 0.25, 0, 1, -0.25, 0, 0.25, 0),
+"times": PackedFloat32Array(0, 1)
+}
+
+[sub_resource type="Animation" id="Animation_nfj4q"]
+resource_name = "exit"
+step = 0.1
+tracks/0/type = "bezier"
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/path = NodePath(".:scale:x")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/keys = {
+"handle_modes": PackedInt32Array(0, 0),
+"points": PackedFloat32Array(1, -0.25, 0, 0.25, 0, 2, -0.25, 0, 0.25, 0),
+"times": PackedFloat32Array(0, 1)
+}
+tracks/1/type = "bezier"
+tracks/1/imported = false
+tracks/1/enabled = true
+tracks/1/path = NodePath(".:scale:y")
+tracks/1/interp = 1
+tracks/1/loop_wrap = true
+tracks/1/keys = {
+"handle_modes": PackedInt32Array(0, 0),
+"points": PackedFloat32Array(1, -0.25, 0, 0.25, 0, 0, -0.25, 0, 0.25, 0),
+"times": PackedFloat32Array(0, 1)
+}
+tracks/2/type = "bezier"
+tracks/2/imported = false
+tracks/2/enabled = true
+tracks/2/path = NodePath(".:modulate:a")
+tracks/2/interp = 1
+tracks/2/loop_wrap = true
+tracks/2/keys = {
+"handle_modes": PackedInt32Array(0, 0),
+"points": PackedFloat32Array(1, -0.25, 0, 0.25, 0, 0, -0.25, 0, 0.25, 0),
+"times": PackedFloat32Array(0, 1)
+}
+
+[sub_resource type="AnimationLibrary" id="AnimationLibrary_vvkcp"]
+_data = {
+"RESET": SubResource("Animation_n7kxn"),
+"enter": SubResource("Animation_lg0kn"),
+"exit": SubResource("Animation_nfj4q")
+}
+
 [sub_resource type="Curve" id="Curve_cs3iy"]
 _data = [Vector2(0, 1), 0.0, 0.0, 0, 0, Vector2(1, 0), 0.0, 0.0, 0, 0]
 point_count = 2
@@ -280,7 +397,6 @@ stream = ExtResource("2_qt0aq")
 [node name="texture" type="AnimatedSprite2D" parent="."]
 unique_name_in_owner = true
 position = Vector2(0, -50)
-scale = Vector2(-1, 1)
 sprite_frames = SubResource("SpriteFrames_wcqpm")
 animation = &"idle"
 
@@ -309,6 +425,12 @@ libraries = {
 "": SubResource("AnimationLibrary_kbmff")
 }
 
+[node name="stageAnimator" type="AnimationPlayer" parent="texture"]
+unique_name_in_owner = true
+libraries = {
+"": SubResource("AnimationLibrary_vvkcp")
+}
+
 [node name="weapons" type="Node2D" parent="texture"]
 unique_name_in_owner = true