Business Logic documentation desperately needs an update

@weblorin and @philipbaileynar and @MattReimer, having to do some business logic updates makes me realize how long it has been since anyone touched this. Should it stay on viewer or is it better to move over to docs? 

[Docs Pargraph](https://docs.riverscapes.net/standards/#business-logic)
[Viewer Out of Date](https://viewer.riverscapes.net/technical-reference/business-logic/)
