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/Effects/FeatherFall.tscn

@@ -19,20 +19,22 @@ curve = SubResource("Curve_k2423")
 
 [sub_resource type="ParticleProcessMaterial" id="ParticleProcessMaterial_kg7ml"]
 particle_flag_disable_z = true
+emission_shape = 1
+emission_sphere_radius = 50.0
 angle_min = 1.0728835e-05
 angle_max = 45.00001
 angle_curve = SubResource("CurveTexture_lwtk5")
 spread = 180.0
-initial_velocity_min = 20.0
-initial_velocity_max = 40.0
-gravity = Vector3(0, 0, 0)
-scale_min = 0.099999994
-scale_max = 0.14999999
+initial_velocity_min = 50.0
+initial_velocity_max = 100.0
+gravity = Vector3(0, 98, 0)
+scale_min = 0.06
+scale_max = 0.099999994
 alpha_curve = SubResource("CurveTexture_suj3b")
 
 [node name="FeatherFall" instance=ExtResource("1_tppsq")]
 
 [node name="particles" parent="." index="1"]
-amount = 2
+amount = 1
 texture = ExtResource("2_k2423")
 process_material = SubResource("ParticleProcessMaterial_kg7ml")