I recommend installing Hubitat Package Manager (HPM) first, and then installing the Rachio Community app via HPM. That will be less of a hassle long-term, since HPM can keep Rachio Community updated automatically.
If you nonetheless want to install manually, the following links will guide you on how to do that.
https://docs.hubitat.com/index.php?title=How_to_Install_Custom_Apps
https://docs.hubitat.com/index.php?title=How_to_Install_Custom_Drivers
No, this is a file that is read by HPM. Ignore this if manually installing.
