导入角色动画，和增加角色控制

Assets/Scripts/NBC.Fantasy/Runtime/Language/LanguageConcrete/LanguageText.cs

@@ -18,6 +18,10 @@ namespace NBC
 
         public string Get(string key)
         {
+            if (string.IsNullOrEmpty(key))
+            {
+                return string.Empty;
+            }
             if (_currentLanguageDictionary != null && _currentLanguageDictionary.TryGetValue(key, out var value))
             {
                 return value;