Document developing on windows

[birdsarah]

Have tested workflow with #648 branch on WSL1 and 2 and it worked smoothly.

Setting up WSL:
https://docs.microsoft.com/en-us/windows/wsl/install-win10

[vringar]

Hm, I still think it's valid to say that people should use Ubuntu.
Whether that Ubuntu is running under WSL2 or a VM is something that researchers can decide for themselves.