WSL support

[drsnuggles8]

Is your feature request related to a problem? Please describe.
OloEngine currently only supports Windows.

Describe the solution you'd like
Would be nice to get WSL working.

[drsnuggles8]

Tried adding basic WSL2 support, build fails because Vulkan is currently not yet supported.
See microsoft/wslg#40 and microsoft/WSL#7790

[drsnuggles8]

how to set up WSL:
Follow windows tutorial.
Make sure to install up2date CMake from kitware, need at least version 3.20..don't chose the Microsoft option in Visual Studio (that installs 3.16).
GLFW needs a few extra things:
sudo apt-get install libx11-dev
sudo apt-get install libxrandr-dev
sudo apt-get install libxinerama-dev
sudo apt-get install libxcursor-dev
sudo apt-get install libxi-dev

Afterwards, it will fail because Vulkan is missing.

[GeorgeS2019]

Vulkan now works in WSL2