(client) feat:实现实体动态创建，实体右键菜单

Co-authored-by: m0_75251201 <m0_75251201@noreply.gitcode.com>
Reviewed-on: #41

Client/Assets/Scripts/Configs/ConfigProcessor.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
+using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
 using System.Xml.Linq;
@@ -339,5 +340,53 @@ namespace Configs
                 return null;
             }
         }
+        /// <summary>
+        /// 获取指定目录下所有匹配后缀名的文件路径（可递归）
+        /// </summary>
+        /// <param name="directoryPath">目标文件夹路径</param>
+        /// <param name="extensions">后缀名列表（如 ["txt", "jpg"]）</param>
+        /// <param name="searchOption">是否包含子文件夹</param>
+        /// <returns>匹配的文件路径列表</returns>
+        public static List<string> GetFilesByExtensions(
+            string directoryPath,
+            string[] extensions,
+            SearchOption searchOption = SearchOption.AllDirectories)
+        {
+            if (string.IsNullOrWhiteSpace(directoryPath))
+                throw new ArgumentException("目录路径不能为空", nameof(directoryPath));
+
+            if (!Directory.Exists(directoryPath))
+                throw new DirectoryNotFoundException($"目录不存在: {directoryPath}");
+
+            if (extensions == null || extensions.Length == 0)
+                throw new ArgumentException("后缀名列表不能为空", nameof(extensions));
+
+            // 标准化后缀名（去掉点，转小写）
+            var normalizedExtensions = new HashSet<string>(
+                extensions.Select(ext => ext.TrimStart('.').ToLower())
+            );
+
+            var result = new List<string>();
+
+            try
+            {
+                var files = Directory.GetFiles(directoryPath, "*", searchOption);
+                foreach (var file in files)
+                {
+                    var ext = Path.GetExtension(file).TrimStart('.').ToLower();
+                    if (normalizedExtensions.Contains(ext))
+                    {
+                        result.Add(file);
+                    }
+                }
+            }
+            catch (UnauthorizedAccessException ex)
+            {
+                // 可选：记录日志或忽略无权限目录
+                Console.WriteLine($"访问被拒绝: {ex.Message}");
+            }
+
+            return result;
+        }
     }
 }