Experimental macro require v2

[Frityet]

An update to #1096 with new semantics:

-- macros.tl
local record macros end
macro macros.double!(x: Statement)
   return ```
      $x
      $x
   ```
end

return macros

-- main.tl
local m = require("macros")
-- also supported: local type m = require("macros")
m.double!(print("hi"))

[Frityet]

@hishamhm I can also make it into local macro ... = require(...)

[github-actions]

Teal Playground URL: https://1102--teal-playground-preview.netlify.app

[hishamhm]

@hishamhm I can also make it into local macro ... = require(...)

If you don't do that, how do you disambiguate which type of require it is?

[mtdowling]

I would love exported macros in the next version of Teal. Let me know if there's anything I can do to help.

[Frityet]

I would love exported macros in the next version of Teal. Let me know if there's anything I can do to help.

It all works pretty great right now (I think this PR doesn't have attaching macros to records in it, but that's fixed in my tl-ng branch) it's just a matter of agreeing on design. I tried tp make it model off of macroexps, where macroexps can be attached to records and interfaces