feat: 重构角色和子弹系统，添加伤害标签和Boss状态条

components/UI/BossBar.tscn

@@ -0,0 +1,27 @@
+[gd_scene load_steps=3 format=3 uid="uid://ofpg5s3j7esv"]
+
+[ext_resource type="Script" path="res://scripts/Statemachine/EntityStateBar.gd" id="1_q4vrr"]
+[ext_resource type="PackedScene" uid="uid://d1ulrvupa76ap" path="res://components/UI/ColorBar.tscn" id="1_uxey7"]
+
+[node name="BossBar" type="Control"]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+script = ExtResource("1_q4vrr")
+
+[node name="health" parent="." instance=ExtResource("1_uxey7")]
+unique_name_in_owner = true
+layout_mode = 1
+anchors_preset = -1
+anchor_left = 0.2
+anchor_top = 1.0
+anchor_right = 0.8
+anchor_bottom = 1.0
+offset_top = -40.0
+offset_right = 0.0
+offset_bottom = -20.0
+grow_horizontal = 2
+grow_vertical = 0