Export Document Renders Nothing

还没有人认领这个 Issue。

### Which OS are you using?

Linux

### Expected Behaviour

"Lua: Export Document" -> Should generate markdown files after choosing the output folder.

### Actual Behaviour

Nothing renders

### Reproduction steps

1. Open a lua file
2. press `ctl + shift + p`
3. select "Lua: Export Document"
4. choose a folder

no output generated.

### Additional Notes

- This may be user error, if so, no notification provided by the extension.
- I'm using LuaJIT as the interpreter.

### Log

```
script/cli/doc.lua:287: bad argument #1 to 'path' (bee::path expected, got nil)
stack traceback:
[C]: in function 'bee.filesystem.path'
script/cli/doc.lua:287: in upvalue 'collectConfig'
script/cli/doc.lua:300: in function 'cli.doc.export'
script/cli/doc.lua:354: in function 'cli.doc.makeDoc'
script/core/command/exportDocument.lua:11: in function 'core.command.exportDocument'
script/provider/provider.lua:984: in function
[C]: in function 'xpcall'
script/proto/proto.lua:200: in function <script/proto/proto.lua:175>
```

先从 script/cli/doc.lua 中第 287 行附近的 collectConfig 以及 script/cli/doc.lua 中的导出路径开始，然后跟踪 script/core/command/exportDocument.lua:11。使用 LuaJIT 重现文档中记录的命令序列，并利用堆栈跟踪检查导出为何没有生成文件。当选定文件夹收到 markdown 输出，或扩展报告明确的配置错误时，即表示完成。

由索引模型根据 Issue 内容生成。