Better directory for packaged shell configurations

[darix]

Hi,

I am currently looking into packaging some of the available shell configurations to make it easier for users to install and update them. I noticed other packages install things into /etc/xdg/quickshell/myconfig

Though I think this directory should be for admin provided configuration.

Could we extend the search list maybe to also use

${CMAKE_INSTALL_LIBDIR}/quickshell/myconfig/ or ${CMAKE_INSTALL_DATADIR}/quickshell/myconfig/