ORCA not listed on the octave package index

[tpapastylianou]

Dear maintainers,

I noticed your package does not appear on the octave package index. Please consider adding it! You can find the octave package index and instructions how to add your package here: https://gnu-octave.github.io/packages/

Ideally you should create a package in the octave package format, that could be installed via octave's pkg command; however, this no longer a strict requirement, and packages with custom installation instructions are also accepted on the index, as long as they provide clear installation instructions. :)