A lot of them are reaching to be bigger so I've refactored them
similarly to C codebases with the `main()` entrypoint.
Apparently, this is how bigger shell scripts are written like Neofetch,
pfetch, and some Kubernetes helper scripts.
This script uses Oil shell as an initial test for writing scripts with
Oil shell. I think it's a great starting example demonstrating the newer
features such as eggexes and the new formatting of the blocks (e.g., if
and while loops).
Also, updated some scripts lel.