partial Include statement path format support

[genius257]

Currently only relative include paths gets correctly resolved

using a mix of forward and backwards slashes in the path seems to work fine, but may break UNC paths if the special prefix gets changed to forward slashes \\?\. Testing will be needed.

partial paths ✅

#include <Array.au3>
#include "scriptA.au3"
#include "folder/scriptB.au3"

partial path edge case ❌

#include "c:scriptA.au3"
#include "c:folder/script.au3"
#include "d:AutoIt/scriptX.au3"

absolute paths ❌

#include "c:\users\John\Documents\AutoIt\scriptA.au3"
#include "\users\John\Documents\Autoit\scriptB.au3"
#include "\\?\c:\users\John\Documents\AutoIt\scriptC.au3"