Implement custom style for additional components

Description

Hi I'm Mohamed BADDI,

After using chat runner i found that the checkboxes, radiobuttons and matrix share same style with inputs of answers.

In my case style wasn't look good because I'm using white color as background for some components such inputs and radio buttons not show up because white color is applied.

I implement new params to allow customize styling for checkboxes, radiobuttons and matrix.

Please feel free to checkout the pull request 🙏

Thank you.

Compilation result