feat: add packages and services in home

* This adds a dependency on `rde`, it is used for serializing ini

* Themes package that can make a few themes of various variants
* Dconf that can load dconf on home activation
* Gtk that can set gtk theme, icon theme and pointer theme
* Kanshi, swayidle services that provide shepherd services
* A few Wayland services
* Xdg desktop portal adding a config, and the packages to profile