Enhancement: Rainbow brackets in Positron Quarto visual mode

This was one of my favorite 'quality of life' improvements in newer Rstudio versions. It'd be wonderful if this could be integrated. Current Rainbow Bracket VSCode extensions do not transfer to Quarto's visual mode (though they do work in source mode!).

from: https://github.com/posit-dev/positron/discussions/8022

Note that "Rainbow Brackets for Visual Studio Code" shows:
This extension is deprecated as this functionality is now built-in to VS Code. Configure these settings to use this functionality.

System details:

Positron and OS details:

All

Interpreter details:

N/A

Describe the issue:

Rainbow brackets don't work in Quarto visual mode.

Steps to reproduce the issue:

Expected or desired behavior:

Rainbow brackets functionality is present.

Were there any error messages in the UI, Output panel, or Developer Tools console?

N/A

The report concerns Quarto visual mode, while rainbow brackets already work in source mode and VS Code has built-in settings for the functionality. Start by locating the visual-mode editor integration and comparing it with source mode. Done means rainbow brackets appear in visual mode without relying on deprecated extensions.