This commit:
- Moves the rest of the packages from packages.sh to PKGBUILD
- Updates the README to include upstream packages instead of relying on
our own local versions of them
- Removes the rest of the legacy install scripts
- Adds some missing config options and other useful commands to the
README and help files
- Removes the local copy of launch-cmd in favor of upstream instead
- Moves a variety of smaller help files to other.md
- Adds fish information to other.md
- Moves automation information to install-guide.sh
- Removes the local copy of Arch Silence in favor of upstream instead
- Updates theme_helper.cr before eventually removing it in favor of Mica
