Feature request: Dark mode for code runner blocks

[terrimorton]

On the https://dotnet.microsoft.com website, we have a dark mode and a light mode implemented. We have received user feedback (e.g. https://github.com/dotnet/website/issues/5748#issuecomment-1797055436) that light mode code blocks are jarring and would like the ability to use dark mode. For static code blocks on the website, we are using prism.js's built-in function for light/dark mode, but have been unable to affect any changes for the try.net code runner blocks.

We would like try.net to support the ability to switch between dark and light mode.