Fixes the udev path and properly adapts the udev rules and
service to use the correct directory.
Outstanding problems:
As seen here https://github.com/MatMoul/g810-led/blob/master/INSTALL.md, the udev rules and reboot service need profiles to load from /usr/share/g810-led/profile and /usr/share/g810-led/reboot The default files are located in /usr/share/g810-led/samples and should be copied on first install.
I don't know how to make Solus create these files only on first install but not on package upgrades to not override user changes.