Create two .clang-format configs that cover Linux headers and Windows drivers. Investigate how to use both files in parallel in one repo for different files

In https://github.com/virtio-win/kvm-guest-drivers-windows repo we have 2 code style:

1. for Windows drivers
2. for Linux common source

clang format tools style detector https://clangpowertools.com/clang-format-editor.html doesn't seem to work with more than one code sample

unformat https://github.com/johnmcfarlane/unformat slow

clang-unformat https://github.com/alandefreitas/clang-unformat It fells to new to me to trust

https://github.com/virtio-win/kvm-guest-drivers-windows/blob/master/contributing.md#use-a-consistent-coding-style