Cloud Heatmap docs

[rennis250]

No description provided.

[marc-tonsen]

On the light theme this looks fine, but on the dark theme these images look a bit odd. Could we create them using a transparent background? Otherwise, some more white padding would help to frame them better on a dark background.

[rennis250]

Ok. Maybe I go for more white padding, as the black text will be lost in dark mode otherwise, but I guess I could also hook into the theme system to swap between two images. I will see if vite offers something like that

[marc-tonsen]

That's possible in Vitepress, but so far we have been trying to avoid creating additional versions of image assets as that is increasing the maintenance effort. Adding patting would be easier!