Add DataPath.cs and revert CSharpRunner.cs changes

# Submission Instructions

## Content of this submission

### 1.  Synchronize official CSharpRunner.cs
- Synchronize `CSharpRunner.cs` to the latest official version
- **Removed** extended support for non-standard metadata formats (XML, C# style, JS style)
- Restore to the official standard metadata parsing method

### 2.  Migrate DataPath.cs
- Migrate `DataPath.cs` to the new version of the code repository
- Maintain the original functionality unchanged:
  - `DataPath.Init("ScriptName")` - create a configuration folder
  - `DataPath.Get()` - Gets the path of the configuration folder

## Reason for change
1. **Facilitate official merging**: Retaining custom metadata formats increases the risk of conflicts with the official codebase. Removing them allows for smoother acceptance of official updates
2. **Reduce maintenance costs**: The official CSharpRunner.cs undergoes frequent changes, making the maintenance of custom branches a significant workload
3. **Maintain consistency**: Keep consistent with the official version to avoid compatibility issues caused by format differences

## Scope of impact
- Previously supported non-standard metadata formats (XML, C# style, JS style) will no longer be recognized
- Only supports official standard metadata formats
- The functionality of DataPath.cs remains unaffected, and the configuration management function is still operational and available

## Remarks
- DataPath.cs and CSharpRunner.cs have previously been modified, and this time it is only for migration and synchronization purposes
- AI-assisted participation was involved in the previous modification process

MinecraftClient/Scripting/DataPath.cs

@@ -0,0 +1,52 @@
+using System;
+using System.IO;
+
+namespace MinecraftClient.Scripting
+{
+    public static class DataPath
+    {
+        private static string? relativePath;
+        private static string? absolutePath;
+
+        public enum PathType
+        {
+            Relative,
+            Absolute
+        }
+
+        /// <summary>
+        /// 初始化数据目录（修正版）
+        /// 需要手动传入脚本文件名（不含.cs扩展名）
+        /// </summary>
+        /// <param name="scriptName">脚本文件名（不含扩展名）</param>
+        public static void Init(string scriptName)
+        {
+            if (string.IsNullOrEmpty(scriptName))
+                throw new ArgumentNullException(nameof(scriptName), "脚本名称不能为空");
+
+            // 计算路径
+            relativePath = scriptName;
+            absolutePath = Path.Combine(AppContext.BaseDirectory, scriptName);
+
+            // 创建目录
+            if (!Directory.Exists(absolutePath))
+                Directory.CreateDirectory(absolutePath);
+        }
+
+        /// <summary>
+        /// 获取路径
+        /// </summary>
+        public static string Get(PathType pathType = PathType.Relative)
+        {
+            if (string.IsNullOrEmpty(relativePath) || string.IsNullOrEmpty(absolutePath))
+                throw new InvalidOperationException("请先调用DataPath.Init()初始化");
+
+            return pathType switch
+            {
+                PathType.Relative => relativePath,
+                PathType.Absolute => absolutePath,
+                _ => throw new ArgumentOutOfRangeException(nameof(pathType))
+            };
+        }
+    }
+}