WIP: Add example of custom global shortcut on Windows

[dsatyanov]

Example of custom global shortcut on Windows - hardcoded Alt+Shift+3.
It's just prove of the concept

Feature is discussed here:
#1341
#2168
and in other places - please link/comment them if they're needed here

@mmahmoudian It looks like we actually don't need CLI on Windows to have custom global shortcuts on this OS, is it correct?
Please tell me if it's worth to finish this solution to have fully customizable shortcuts on Windows, so I'll try to do it.

P.S. I'm not a c++ dev, I've found the solution from ChatGPT, so it's likely really bad code but it seems to prove that it's technically possible to have custom global shortcuts on Windows

[mmahmoudian]

It looks like we actually don't need CLI on Windows to have custom global shortcuts on this OS, is it correct?

I haven't used or touched Windows in years. My suggestion is

Please tell me if it's worth to finish this solution to have fully customizable shortcuts on Windows, so I'll try to do it.

I bet it does. But I mainly do triage in this repo. C++ devs are @veracioux and @panpuchkov . Perhaps @jack9603301 can also give us his opinion