Consider unifying the build instructions for different OSs.

[kuzminrobin]

On https://github.com/microsoft/qsharp-runtime (README.md) the instructions to build are different for Win and for Linux/MacOS. Consider unifying to

For all OSs: bootstrap.ps1 dotnet build Simulation.sln dotnet build src\Simulation\Native\build\quantum-simulator.sln (Why this currently does not work? (requires separate steps)) dotnet test Simulation.sln

For Win (alternative way to build and run tests): Open Simulation.sln in VS, build, run tests.