[API FR] Stats for a Given Day

[Servinjesus1]

I'd like to build my own daily word count heatmap by including this plugin's stats by day into the dataview metadata for each day's daily note.

For one, does this plugin store daily data in perpetuity or just the current day's data?

If the latter, I think additional API functions may work great, in other words extending getTotal* functions to take an optional date parameter, defaulting to today without it.