Add section: build instructions for Windows

[pedropintosilva]

This is an Easy Hack.
Potential mentors: @pedropintosilva , @Darshan-upadhyay1110

Detailed description and rationale

Originally reported here https://forum.collaboraonline.com/t/how-to-setup-the-collabora-online-in-windows/2743/6

Add new section in https://collaboraonline.github.io/post/build-code/ for Windows users so, they can build Collabora Online within their Windows machine. Currently we only have mention to Windows when talking about GitPod, it would be good to guide the contributor on how to build Collabora Online locally.

Code pointers

• Add a new section into https://github.com/CollaboraOnline/CollaboraOnline.github.io/blob/master/content/post/build-code.md
• Add new option into https://github.com/CollaboraOnline/CollaboraOnline.github.io/blob/master/layouts/shortcodes/build-dropdown.html
  • Descriptive/intro paragraph listing some of the available options:
  • Install Linux in a container via docker (Linux containers on Windows 10 | Microsoft Learn (https://ubuntu.com/tutorials/windows-ubuntu-hyperv-containers#1-overview) and then follow the listed instructions here for the distro that you have chosen
  • Or another way would be to install Windows Subsystem for Linux (WSL) and then within that Linux container/environment follow Build listed here for the Ubuntu