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.

先追蹤語言伺服器如何回報 undefined-global 診斷，以及它如何處理 load、loadfile 和 loadstring 環境。將該行為與 mainFile.lua 和 secondFile.lua 範例進行比較，接著判斷環境辨識或 @global 註解是否才是預期的範圍。完成的標準是：在選定的行為下，該範例不再將 foo 回報為未定義。