Replace `lovemii.nu` `sv` with `sys` extended subcommands.

[BeyondMagic]

• sys services to view list of services available at the system. (needs dinit)
• link device usernames to another:
  • computer: terra
  • laptop: luna
• Switch from runit to dinit, main reason being the need for a dependency feature between services. ✉️
  • laptop: luna
  • computer: terra
• Packages:
  • Add xf86-input-wacom libinput for laptop.
  • Fix vim-hexokinase, should run make hexokinase on install for neovim.
  • Services should target dinit if it exists first, package alone second.