Better global recognizing for loadfile

In some cases you might need to make the plugin recognize a specific local variable as global, without declaring that variable as an actual global, one of these cases are using load and loadfile were you can pass an env variable that represents the chunk environment.

*mainFile.lua

local env = setmetatable(
  {foo = function(a, b) return a == b end},
  {__index = _G}
)

loadfile('./secondFile.lua', 't', env)

*secondFile.lua

foo(1, 2) -- Undefined global `foo` . Lua Diagnostics.(undefined-global)

So i would suggest better recognizing for load/loadfile/loadstring environment or/and a custom emmylua annotations --- @global that marks the local var as a global one.

Thanks in advance.

首先跟踪语言服务器如何报告 undefined-global 诊断，以及它如何处理 load、loadfile 和 loadstring 环境。将该行为与 mainFile.lua 和 secondFile.lua 示例进行比较，然后确定环境识别还是 @global 注解才是预期范围。完成的标准是：在所选择的行为下，该示例不再将 foo 报告为未定义。