feat libqalculate

request to provide, command line version of qalculate ( feature rich calculator ) https://qalculate.github.io/ https://qalculate.github.io/downloads.html https://github.com/Qalculate/libqalculate/releases/download/v3.20.1/libqalculate-3.20.1.tar.gz

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information