I somehow missed that Data Source Actions came out with Brooklyn. I was just re-reading the release notes for Brooklyn Version 10.0 and found them! Thanks!
I feel like the community should know more about Data Source Actions. What would you do with a Data Source Action? Want to send an email from a button? Check! Want to start an approval process from a model action? Check! Want to call a process builder setup to be called by another process builder (i.e. an invocable Flow)? Check!
Here is a screen shot of the actions available for the salesforce data source.
Thanks again Skuid!