Add a post-link script to fetch the raw input data files directly from the tudat-resources Github repository

[niketagrawal]

Currently, creating a conda package for the input data files in tudat-resources GitHub repository presents a storage bottleneck on the Anaconda server. Considering that version control on individual data files is not a priority, distributing the data files as releases on the GitHub repository could be a solution. Github allows individual file size to be a maximum of 2GB, and does not impose any limits on the total size of the release.

Currently, the conda package tudat-resources is a dependency for both tudat and tudatpy. The post-link.sh script in tudat-resources-feedstock downloads the raw data files to the directory .tudat/resource on the host machine. This script is executed by conda as the last step of the installation process.

As a first step towards enabling this workflow of directly downloading the raw data files directly from the Github repsoitory, a similar post-link script can be created for tudatpy-feedstock and tested if the script is executed and the data files are downloaded. This script can be later moved to tudat-feedstock.

The existing dependency of tudat and tudatpy on tudat-resources is kept intact for the initial test. A different target location than .tudat/resource will be specified to verify the successful execution of the post-link script.

[niketagrawal]

Closed with #10