Replace README.md

The README looks like it comes from the VCam sample project, from which this code was inspired. Please rewrite the README in your own words, and please include a list of requirements such as required Windows version, any requirements on compiler, what steps need to happen to make it run in CI or locally. An optional bonus would be if we had a quick overview over how the code works as well.

You may also include a link to the original repo that inspired this code, so we can look at it in case there is something we need to understand.