feat: 新增角色系统及基础功能实现

新增HCN、Lynx和MuyangDog三个可玩角色及其相关资源
实现角色选择界面和角色属性系统
重构玩家生成逻辑以支持角色选择
优化角色卡片UI显示效果

scripts/Tools/ArrayTool.gd

@@ -31,3 +31,17 @@ static func fill(origin: Dictionary, filler: Callable) -> Dictionary:
 			return accum,
 		{}
 	)
+static func dictionaryFromEntries(keys: Array, values: Array) -> Dictionary:
+	var result = {}
+	for index in len(keys):
+		var key = keys[index]
+		var value = values[index]
+		result[key] = value
+	return result
+static func mergeDictionary(a: Dictionary, b: Dictionary) -> Dictionary:
+	var result := {}
+	for key in a:
+		result[key] = a[key]
+	for key in b:
+		result[key] = result.get(key, 0.0) + b[key]
+	return result