"[DEP0132] DeprecationWarning" warnings in the current main.js

I'm using neovim with copilot. Current code of language server spam my logs with an annoying depreciation warnings in LSP logs (I'm using the copilot.lua though):

```
[ERROR][2025-07-04 16:10:21] ...p/_transport.lua:36 "rpc" "node" "stderr" "(node:32377) [DEP0132] DeprecationWarning: Passing a callback to worker.terminate() is deprecated. It returns a Promise instead.\n(node:32377) [DEP0132] DeprecationWarning: Passing a callback to worker.terminate() is deprecated. It returns a Promise instead.\n(node:32377) [DEP0132] DeprecationWarning: Passing a callback to worker.terminate() is deprecated. It returns a Promise instead.\n(node:32377) [DEP0132] DeprecationWarning: Passing a callback to worker.terminate() is deprecated. It returns a Promise instead.\n"
```

The could be easily fixed if we replace this piece of code in `main.js`:

```diff
- this.workers[i].worker.terminate(()=>{n++,n===this.workers.length&&(this.workers=[],r())})
+ this.workers[i].worker.terminate().then(()=>{n++,n===this.workers.length&&(this.workers=[],r())})
```

从 main.js 中 issue 所示的 worker 终止调用开始。按描述更新该调用，然后运行语言服务器或可用的检查，并确认 DEP0132 警告不再出现在 LSP 日志中。

由索引模型根据 Issue 内容生成。