Make it easy to install mingw packages/libraries

[Emilgardis]

Checklist

• I've looked through the issues and pull requests for similar request
• This feature could be solved with a custom docker image (optional)

Describe your request

I want it to be easy to install libraries for mingw, say using something like https://github.com/HolyBlackCat/quasi-msys2

Describe why this would be a good inclusion for cross

This would lower the threshold for windows-gnu targets, as it'd be much easier to get the packages you need

[Emilgardis]

it was pointed out that fedora has more mingw packages available. https://packages.fedoraproject.org/search?query=mingw64