Development images for R and Python

An automated pipeline has been set up to automatically build images: one for R (_renv, 1.44GB) and one for Python (_pyenv, 6.66GB) development. Two Dockerfiles define these images and they're both pushed to the Renku registry once built. The R image includes:

• base R
• BioCManager
• SingleCellExperiment

The python image includes:

• base python
• pytorch
• setuptools
• pip
• numpy
• joblib
• pandas
• pyarrow
• jupyterlab