chore: outline rewrite without code changes

* this does not work yet
* comments & documentation will be added once the rewrite is complete

config/scripts/example.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+# Tell this script to exit if there are any errors.
+# You should have this in every custom script, to ensure that your completed
+# builds actually ran successfully without any errors!
+set -oue pipefail
+
+# Your code goes here.
+echo 'This is an example shell script'
+echo 'Scripts here will run during build if specified in recipe.yml'