New dashboard : heatmap / calendar for distance per day, charge level, etc.

[pihomeserver]

What would you like to be added:
In GitHub I like the display of the number of commits in a repo using a kind of heatmap. So that would be nice to have the same for distance per day or charge level for example

Why is this needed:
For stats :-)

Additional context:
I installed the Cal-HeatMap grafana plugin in the container with grafana and made a try to generate a first draft :
(no much data as i owned the car for less than 2 weeks)

I can share the JSON of the dashboard if needed but the SQL is pretty simple (based on the table Drives)