feat(角色): 调整Rooster受伤时的羽毛掉落效果

- 为Rooster添加受伤时的羽毛掉落特效
- 调整FeatherFall粒子效果参数，包括速度、重力和大小
- 修改DogCircle子弹的初始状态和动画时间
- 调整Dog武器节点的位置
- 为EntityBase的受伤方法添加注释

components/Bullets/DogCircle.tscn

@@ -17,7 +17,7 @@ tracks/0/keys = {
 "times": PackedFloat32Array(0),
 "transitions": PackedFloat32Array(1),
 "update": 0,
-"values": [Vector2(1, 1)]
+"values": [Vector2(0, 0)]
 }
 tracks/1/type = "value"
 tracks/1/imported = false
@@ -29,7 +29,7 @@ tracks/1/keys = {
 "times": PackedFloat32Array(0),
 "transitions": PackedFloat32Array(1),
 "update": 0,
-"values": [1.0]
+"values": [0.0]
 }
 
 [sub_resource type="Animation" id="Animation_oinqg"]
@@ -76,7 +76,7 @@ tracks/1/path = NodePath("texture:material:shader_parameter/alpha")
 tracks/1/interp = 1
 tracks/1/loop_wrap = true
 tracks/1/keys = {
-"times": PackedFloat32Array(0, 0.25, 0.6, 1),
+"times": PackedFloat32Array(0, 0.1, 0.6, 1),
 "transitions": PackedFloat32Array(1, 1, 1, 1),
 "update": 0,
 "values": [0.0, 1.0, 1.0, 0.0]
@@ -94,7 +94,7 @@ _data = {
 shader = ExtResource("2_ddosv")
 shader_parameter/inner = 0.7999999821184
 shader_parameter/outer = 0.999999977648
-shader_parameter/alpha = 1.0
+shader_parameter/alpha = 0.0
 
 [sub_resource type="CapsuleShape2D" id="CapsuleShape2D_ddosv"]
 radius = 13.0
@@ -115,6 +115,7 @@ libraries = {
 [node name="texture" type="Node2D" parent="texture" index="1"]
 modulate = Color(1, 1, 1, 0.08421052)
 material = SubResource("ShaderMaterial_qyd4u")
+scale = Vector2(1e-05, 1e-05)
 script = ExtResource("3_qyd4u")
 size = Vector2(40, 150)
 color = Color(1, 1, 1, 0)