[Gentoo] Kernel config, system config, dotfiles

This should be everything needed to kick start Gentoo on my current hardware. The dotfiles should be useful irrespective of hardware.

• 💻 dotfiles
• 🐮 gentoo config

Shown here is a customized mashup between the Adwaita GTK theme, the Arc Dark icons, the Pencil terminal theme, and a fish prompt to match.