Create entry point validate function

[kdallmeyer-sr]

Each one of the validators have their own entry point to start validation. We need a single pattern and allow for plugging in new validators and/or printers as necessary.

In Baleen-Script I did something that could kickstart this.

https://github.com/ShopRunner/baleen/blob/master/baleen-script/src/main/kotlin/com/shoprunner/baleen/script/validate.kt