Plugin ResolveRequire is getting the wrong URI

还没有人认领这个 Issue。

### How are you using the lua-language-server?

Visual Studio Code Extension (sumneko.lua)

### Which OS are you using?

Windows/Linux

### What is the issue affecting?

Plugins

### Expected Behaviour

Over the [plugins page](https://luals.github.io/wiki/plugins/#resolverequire) it seems to me like ResolveRequire first parameter is the current file the require is being typed at.

### Actual Behaviour

But in reality it seems to be the workspace URI, not the file.

### Reproduction steps

1. Make a new plugin
2. Paste the same code shown in screenshot
3. Type out some `require` statement, you will see the URI of the workspace in the output instead of the `require` statement file.

### Additional Notes

See https://github.com/LuaLS/LuaLS.github.io/issues/48

### Log File

_No response_

从插件的 ResolveRequire 入口点开始，将输入 require 语句时传递的 URI 与 plugins 页面中描述的行为进行比较。使用截图中的插件示例在 VS Code 扩展中复现该问题；完成的标准是 callback 接收到 require 语句的文件 URI，而不是 workspace URI。

由索引模型根据 Issue 内容生成。