Register function environment variables

还没有人认领这个 Issue。

This extension is able to detect usage of undefined global variables:

However, `setfenv` is used on this function to define the missing variable, but at another point in the code that the parser can't detect. Is it possible to somehow tell the parser to ignore this diagnostic? Something like:
```lua
local block = function(_)
-- env: {block, assert, error}
block()
end
```

Then it would accept those values? I know you can define globals for the project, but this doesn't affect the entire project, only those functions, so it would be cool if you could define it somehow.

Alternatively, could we just disable the diagnostic?
```lua
local block = function(_)
-- disable: undefined-global
block()
end
```

I don't know if the parser supports reading comments like that, let me know if that won't work or if you have better ideas for it.

首先跟踪 parser 的未定义全局变量诊断，以及它如何读取项目级全局定义。评估 issue 中提出的函数局部环境注解和禁用诊断的注释，然后确认所选语法只会抑制或解决预期的函数作用域警告。

由索引模型根据 Issue 内容生成。