feat: 添加小鸡角色显示名称，更新Boss状态条和伤害标签逻辑，增强EntityBase类的移动和攻击功能

scripts/Statemachine/BossBar.gd

@@ -0,0 +1,11 @@
+extends EntityStateBar
+class_name BossBar
+
+@onready var nameLabel: Label = $"%name"
+@onready var valueLabel: Label = $"%value"
+
+func _process(delta):
+	super._process(delta)
+	if entity:
+		nameLabel.text = entity.displayName
+		valueLabel.text = "%.2f" % (entity.health / entity.fields[FieldStore.Entity.MAX_HEALTH] * 100)