Add support for folding region-marker comments.

[Hicsy]

Similar to how other languages use regions in VSCode, accept a comment marker ; followed by the Keyword region (whitespace is ignored). Any other text can follow this word like a normal comment.
VS Code will then naturally support folding up that region until the next ; endregion comment.
Example Used

Example:

/*
 * My AHK Script
 * It does nothing
 */

; region ==================== Initialisation ====================
#Persistent
#SingleInstance, Force
myVar := 0
; endregion ==============================================

;region ===================== Main ========================
#IfWinNotActive, ahk_exe chrome.exe
return
#IfWinNotActive
;endregion

[Hicsy]

Proposal: Add region-folding.
Gday, I tested this on my PC and it worked fine. If you deliberately left out region markers or added others elsewhere, please advise.
I provided an example above which shows:

1. Follows same keyword format as most other languages.
2. The Regex accounts for various whitespace (as per linked Microsoft Example).
3. Allows comments or no comments on same line.

As is standard in VSCode, regions can also be layered such as my typical H1/H2 comments:

;region ========== Main ==========
#Persistent
#SingleInstance, Force


;region ---------- bind: spacebar ----------
space::
return
;endregion ---------------------------------


;region ---------- bind: control ------------
ctrl::
return
;endregion ---------------------------------
;endregion ====== End: Main ==========

ps sorry about the formatting, the start of the file uses tabs, the end of the file uses spaces, and I am currently trying out the new "propose change" flow from the GitHub web site so no idea which one it will use 😉

Cheers,
Hicsy