Add batch version of workshop/geopython-workshop-ctl.sh for Windows users who don't have WSL

[Nnnes]

Workshop participant from FOSS4G EU here!

Including a Windows batch file equivalent to workshop/geopython-workshop-ctl.sh would help things run more smoothly for Windows users without requiring installation of WSL.

Running the existing shell script in Powershell works (on my machine), but requires WSL, as bash is a deprecated command that I believe now just functions as an alias for wsl.

A batch file is advantageous over a .ps1 Powershell script because it does not require changing ExecutionPolicy.

(I will submit a pull request with such a batch file shortly)