feat(武器系统): 添加武器背包功能及武器展示组件

实现武器背包功能，用于存储已获得的武器名称。新增WeaponShow组件，根据操作类型显示不同的武器信息。修改Feed.gd以支持武器展示逻辑，包括获取和提炼两种操作状态。

scripts/Statemachine/WeaponShow.gd

@@ -0,0 +1,32 @@
+@tool
+extends HBoxContainer
+class_name WeaponShow
+
+enum Operation {
+	GET,
+	EXTRACT,
+}
+
+@export var weapon: PackedScene = null
+@export var operation: Operation = Operation.GET
+
+@onready var operationLabel: Label = $"%operation"
+@onready var avatarRect: TextureRect = $"%avatar"
+@onready var nameLabel: Label = $"%name"
+@onready var soulShow: ItemShow = $"%soul"
+
+func _ready():
+	var weaponInstance = weapon.instantiate() as Weapon
+	avatarRect.texture = weaponInstance.avatarTexture
+	nameLabel.text = weaponInstance.displayName
+	soulShow.count = weaponInstance.soulLevel
+	if operation == Operation.GET:
+		operationLabel.text = "获得"
+		avatarRect.visible = true
+		nameLabel.visible = true
+		soulShow.visible = false
+	else:
+		operationLabel.text = "提炼"
+		avatarRect.visible = false
+		nameLabel.visible = false
+		soulShow.visible = true