Python Scripts is a part of the Home Assistant
Python Scripts is not enabled by default in HACS, the reason for that is that it is not enabled by default in Home Assistant.
Enable Python Scripts in HACS
There are 2 ways of doing this.
Enable if you used the UI to configure HACS
Add a checkmark to the left of python_scripts in the UI configuration for HACS.
Enable if you used the YAML to configure HACS
If you used YAML to configure HACS, add this under your HACS connfiguration to enable Python Scripts.
When you have done that you need to restart Home Assistant.
Python Scripts in Home Assistant
Add this to your
Python Scripts download location
All the Python Scripts you download with HACS is stored in
python_scripts/ in your Home Assistant configuration directory.