Use wfolder to change directory on Windows

@echo off
rem Based on https://github.com/eteeselink/cdhere/blob/master/cdhere/src/cdhere.cmd

set CDWHERE=

:: execute cdwhere, store output in %CDWHERE%
:: cdwhere will write any errors to stderr
for /f %%a in ('%~dp0wfolder.exe') do SET CDWHERE=%%a

if "%CDWHERE%"=="" (
  rem got error
) else (
  cd /d %CDWHERE%
)

:: remove %CDWHERE%
set CDWHERE=