feat(UI): 添加技能图标显示功能

在UI中添加技能图标容器，并为每个武器创建对应的技能图标
初始化武器冷却计时器，修复武器冷却时间未设置的问题

scripts/Statemachine/EntityBase.gd

@@ -111,6 +111,10 @@ func _ready():
 				else:
 					UIState.energyPercent.setCurrent(newEnergy)
 		)
+		for i in weapons:
+			var icon: SkillIcon = preload("res://components/Abstracts/SkillIconBase.tscn").instantiate()
+			icon.weapon = i
+			UIState.skillIconContainer.add_child(icon)
 	else:
 		currentFocusedBoss = get_tree().get_nodes_in_group("players")[0]
 		applyLevel()

scripts/Statemachine/SkillIcon.gd

@@ -1,4 +1,5 @@
 extends PanelContainer
+class_name SkillIcon
 
 @export var weapon: Weapon = null;
 

scripts/Statemachine/UIState.gd

@@ -13,12 +13,14 @@ static var currentPanel: FullscreenPanelBase = null
 static var panels: Control
 static var energyPercent: ColorBar
 static var itemCollect: VBoxContainer
+static var skillIconContainer: VBoxContainer
 
 func _ready():
 	bossbar = $"%bossbar"
 	panels = $"%panels"
 	energyPercent = $"%percent"
 	itemCollect = $"%itemCollect"
+	skillIconContainer = $"%skillContainer"
 func _process(_delta):
 	bossbar.visible = !!bossbar.entity
 func _physics_process(_delta):

scripts/Structs/Weapon.gd

@@ -27,16 +27,17 @@ class_name Weapon
 @onready var updateButton: Button = $"%updateBtn"
 @onready var sounds: Node2D = $"%sounds"
 
-var cooldownTimer = CooldownTimer.new()
+var cooldownTimer: CooldownTimer = null
 var originalStore: Dictionary = {}
 
 func _ready():
+	cooldownTimer = CooldownTimer.new()
+	cooldownTimer.cooldown = cooldown
 	originalStore = store
 	updateButton.pressed.connect(
 		func():
 			apply(UIState.player)
 	)
-	cooldownTimer.cooldown = cooldown
 	for i in sounds.get_children():
 		i.process_mode = ProcessMode.PROCESS_MODE_ALWAYS
 	rebuildInfo()