Change the radial chart to doughnut chart

[tj-devel709]

This PR changes the Radial Chart to a Doughnut chart. With the Radial chart, there were limited options on how to make the chart's information fully accessible for users who are color-blind and who use a keyboard only.

With the new doughnut chart, the data labels show the category name and the value without needing tooltips or a legend.

Original:

New:

The only concern is that with these data labels on the mobile devices is if they are too long, they will not show up.

Adresses:

• Visual label is not provided for the Chart: A11y_.NET 9 template_.NET 9 template_Home_Labels or Instrunctions. maui#26232
• Chart information is not accessible using keyboard: A11y_.NET 9 template_.NET 9 template_Home_Keyboard. maui#26234
• Only color is used to show the data in the chart: A11y_.NET 9 template_Home_Use of Color. maui#26236