Feature: add support for shebang for R

[alexaandru]

R language also has support for shebang, via Rscript: https://www.rdocumentation.org/packages/utils/versions/3.6.2/topics/Rscript

[apocelipes]

Hi, I'm trying to add the Rscript shebang support. You can find a simple Rscript example in "examples/language/rscript.r".

[alexaandru]

Awesome! Yes, that example looks good!