Necessary to ensure mas is installed before executing the script. This
reduces the strain on downstream projects/scripts from having to do
this check. This was previously part of the macOS Configuration project
but has been moved here as central location for core functionality.
- These scripts default to calling out to scripts of the same name as
defined by the custom configuration project (i.e.
`$MAC_OS_CONFIG_PATH`).
- This helps ensure the scripts in this project can be run
appropriately even if the custom configuration project hasn't fully
implemented all scripts yet.
- This also helps illustrate what scripts are necessary when creating a
custom configuration.
