Astronomia

Fix

- fix cronus to use cltoolbox

Fix

- fixed solstice.py app to use cltoolbox and fixed location finding of astronomia_params.txt to be found when editable

Fix

- replaced createts with pandas version to remove tstoolbox dependency
- marked apps as executable

Fix

- improved some unfinished features though still not complete
- fixed printing of solstices plus documentation and ci fixes

Refactor

- removed a two-line function that was only called once