Schedule jobs to run with Lilypad

[richardblythman]

We want to be ready to load up the Lilypad network with jobs that RPs can run when the incentivized testnet is launched. A simple way of doing this is using cron or systemd timers as a JC.

To start just get the scheduling running with any job (like the cowsay example). Later, we can aim to get it working with something more useful (like a data processing flow that uses LLMs).