This commit adds a post-install bootstrap script meant to be run on a
user's local account in order to install packages, configure dotfiles,
and perform other setup tasks.
It may be ideal to use one universal bootstrap script instead of two
unique ones since both share many similar characteristics.
It is only now that I realize that the Arch Wiki is divided into four
steps: Pre-installation, Installation, Configuration, and
Post-installation. This commit changes my install scripts to follow that
same structure, overall making things a lot easier to both understand
and maintain as a whole.
