New chart ui component

[slippyr4]

@BottlecapDave

I've written this chart component to display upcoming rates in a graph (using sensors from this integration). Not sure if you're interested or not.

Thanks

https://github.com/slippyr4/lovelace-octopusenergy-chart

[BottlecapDave]

Sorry I saw this and then did nothing with it. There is a community section in the docs, which you are more than welcome to create a pull request for with your card. It might also be good to explain or show how it's different to other charting cards like apexcharts.