Detailed README with code examples

[rsoesemann]

@jondavis9898 I see this as a shared assignment for me and you ;-)

[jondavis9898]

@up2go-rsoesemann Sounds like a plan! There are code samples in fflib sample code but happy to provide additional ones. Once you get the baseline readme drafted, just let me know what you need, happy to fill in the gaps!