Write a Rmarkdown tutorial for each of our three SWMM workshops

[mrustl]

https://github.com/KWB-R/kwb.swmm/projects/1

Literature

https://link.springer.com/article/10.1007/s00506-020-00674-9#:~:text=Das%20Stormwater%20Management%20Model%20(SWMM,Pakete%20in%20R%20und%20Python.