feat(武器系统): 添加武器升华选项功能

实现武器升华选项系统，允许为武器添加可选的强化效果。主要修改包括：
1. 新增 SublimateOption 类用于定义升华选项
2. 在 Weapon 类中添加 storeExtra 字典和相关方法用于存储额外属性
3. 为 Tree 武器实现具体的升华选项
4. 添加调试标记 debugRebuild

scripts/Structs/SublimateOption.gd

@@ -0,0 +1,15 @@
+class_name SublimateOption
+
+var displayName: String = "升华"
+var description: String = "描述"
+var executor: Callable = func(_weapon: Weapon, _entity: EntityBase): return
+
+func _init(displayNames: String, descriptions: String, executors: Callable):
+	displayName = displayNames
+	description = descriptions
+	executor = executors
+
+func apply(entity: EntityBase, index: int):
+	var weapon = entity.weapons[index]
+	if weapon is Weapon:
+		executor.call(weapon, entity)

scripts/Structs/SublimateOption.gd.uid

@@ -0,0 +1 @@
+uid://8e7whqgtnl5w

scripts/Structs/Weapon.gd

@@ -54,6 +54,7 @@ var chargedTime: float = 0
 var attackSpeed: float = 1
 var looping: bool = false
 var autoUpdate: bool = false
+var storeExtra: Dictionary = {}
 
 func _ready():
 	cooldownTimer = CooldownTimer.new()
@@ -201,8 +202,8 @@ func buildDescription(showNext: bool = false) -> String:
 			text = "[color=cyan]%s[/color]" % data
 		result = result.replace("$" + key, text)
 	return result
-func readStore(key: String, default: Variant = null):
-	return store.get(key, default)
+func readStore(key: String):
+	return store.get(key, 0) + readStoreExtra(key)
 func playSound(sound: String):
 	var body = sounds.get_node_or_null(sound)
 	if body is AudioStreamPlayer2D:
@@ -241,8 +242,16 @@ func exitLoop(entity: EntityBase):
 	if !looping: return
 	looping = false
 	loopExit(entity)
+func addStoreExtra(key: String, value: float):
+	if !storeExtra.has(key):
+		storeExtra[key] = 0
+	storeExtra[key] += value
+func readStoreExtra(key: String):
+	return storeExtra.get(key, 0)
 
 # 抽象
+func sublimateOptions() -> Array[SublimateOption]:
+	return [] as Array[SublimateOption]
 func update(_to: int, origin: Dictionary, _entity: EntityBase):
 	return origin
 func loopStart(_entity: EntityBase):