make a full replacement for winlean

[ringabout]

Ref nim-lang#12327

The problem

std/winlean keep causing problems, but for backward compatibility, we cannot correct the wrong definitions because they are exported.

The solution

Make a replacement module for std/winlean, and replace the std/winlean gradually. We need to correct some procs mainly which are not exported in the standard libraries.

For example we need to change these procs first. Note that createWinApi is not exported, so we can correct the definitions safely.

import std/windefs

proc createWinApi(x: DWORD) {.importc.}

proc userProc*(x: int) =
  var x: DWORD
  createWinAPI(x)

Then we should consider whether we can make further progresses.

[timotheecour]

very relevant: nim-lang/RFCs#344