添加本地服务端口配置项，允许用户自定义发送JSON数据的端口号

- 在localClient.ts中实现从配置读取端口号，默认值为26000
- 在package.json中添加squirrel.localServicePort配置项
- 用户现在可以通过VS Code设置自定义本地C++服务端口

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/localClient.ts

@@ -21,13 +21,17 @@ function buildJsonData(filePath: string, content: string): string {
  * @returns Promise<boolean> 是否发送成功
  */
 export async function sendFileToCppService(filePath: string, content: string): Promise<boolean> {
+    // 从配置中获取端口号，默认为26000
+    const config = vscode.workspace.getConfiguration('squirrel');
+    const localServicePort = config.get<number>('localServicePort', 26000);
+
     return new Promise((resolve) => {
         const jsonData = buildJsonData(filePath, content);
         const postData = jsonData;
 
         const options: http.RequestOptions = {
             hostname: '127.0.0.1',
-            port: 26000,
+            port: localServicePort,
             path: '/send_data',
             method: 'POST',
             headers: {