fill area under chart line

### Description

is it possible to fill the area under the chart line easyly?
Chart.js is doing this with the properties fill and backgroundColor of the datasets element.

const data = {
labels: ["1 Dec", "8 Dec", "16 Dec", "31 Dec"],
datasets: [
{
label: "Sales Made",
data: [3, 7, 4, 5],
borderColor: ["#03A9F5"],
fill: true,
backgroundColor: 'pink'
},
],
};
How can I do this in dashbord 2.0 chart?

### Have you provided an initial effort estimate for this issue?

I have provided an initial effort estimate

The issue provides no file, test, or entry point. Start by locating the Dashboard 2.0 chart implementation and its handling of dataset properties such as fill and backgroundColor; done means the requested area fill and color can be configured and the relevant checks pass.

Written by the indexing model from the issue text.