doc: how to use advanced features of configure on Windows

[refack]

Refs: #17066

The configure script recognizes many CLI flags for special build formulas. Many are not represented by vcbuild shortcuts, and need to be passed either by:

• Calling python configure --XXX --YYY=PPPP directly, followed by vcbuild noprojgen
• Setting set config_flags=--XXX --YYY=PPPP before calling vcbuild

This should be documented.

[ghost]

Can I take this up?

[joyeecheung]

@lazyspark Sure! The contributing guide should be enough to help you get started.

[juggernaut451]

@lazyspark if you are not working on this.. can i take this up? @joyeecheung @refack

[ghost]

Yes please.

[jake32321]

Hey @juggernaut451 are you still working on this? If not, I could try and take a shot if you don't have the time. Don't want this to change hands too many times but would love to take a crack at this if you don't mind.

[refack]

I was thinking about this today and had the idea of calling python configure --help as part of the help subrutine in vcbuild.bat

[jake32321]

@refack yeah that should be simple enough to make that addition.

[rexagod]

@refack @jake32321 Can I take this up? Thanks!

[refack]

Hello @rexagod, and thanks for the offer.
AFAICT this issue is available for "adoption", so I'd be very grateful if you take this up.

If you haven't already, it's recommended you take a look at CONTRIBUTING.md
Anyway thank you for the contribution, and good luck 🥇

P.S. If you have any questions feel free to contact me directly.

[rexagod]

@refack Thank you for the quick response! Apologies if it takes me a while to wrap my head around this, but you may be assured, I'm working on this. Also, I'll definitely contact you if any confusion arises, and again, thank you so much for the warm welcome! 👍

[rexagod]

@refack Hi! I've made some changes and submitted a PR! Can you take a look? Thanks!