ByteSkript CLI for Un*x

This draft contains no functional changes.

An install-byteskript.sh bash script is included for MacOS/Linux-based operating systems. When run with permissions, it will install an executable to the /usr/local/bin that provides the bsk command as a globally-available alternative to running the Jar directly.

Moving (or renaming) the ByteSkript Jar will break the link, so the install script will need to be re-run.

While this provides no functional advantage, it makes running ByteSkript significantly easier, since the commands become:

bsk run [script]
bsk jar [name]
bsk compile
bsk clean