Add download_weights.py

[jaagut]

Proposed changes

• Add python script for downloading pretrained weights
• Add command yoeo-download-weights for simplification
• Update Readme doc
• Remove old bash script

Related issues

Necessary checks

• [ ] Update poetry package version semantically
• [x] Write documentation
• ~[ ] Create issues for future work~
• [x] Test on your machine

[jgueldenstein]

What is the status on this?

[Flova]

It has been stale for a while, but the bash script should work. It just has no Windows support.