Option to follow theme's bracket colors

Title: I'd like to think this would be an aesthetically pleasing option for many people. I have manually set my indentation colours to work with the theme I use the most (see image below) and would love to see functionality to change this dynamically.

I don't care, but if somebody puts up a PR, I will most likely accept it.

For me, I changed my brackets to match indent-rainbow's colors:

settings.json:

{
	// Other settings here...

	// Set bracket colors to match the rainbow indent extension's colours
	"workbench.colorCustomizations": {
		"editorBracketHighlight.foreground1": "#ffff40",
		"editorBracketHighlight.foreground2": "#7fff7f",
		"editorBracketHighlight.foreground3": "#ff7fff",
		"editorBracketHighlight.foreground4": "#4fecec",
		"editorBracketHighlight.unexpectedBracket.foreground": "#ff0000"
	},

	// Other settings here...
}

Hi, i like this style, you explain me how extract the #colors from theme?

If you want to pull out the colors from a theme, you can do this:

1. Go to this folder: https://github.com/microsoft/vscode/tree/main/extensions

2. Open the folder that holds your theme. My theme is monokai, so I opened the theme-monokai folder

3. Find the theme json file (not the package.json file)

   So for my theme (Monokai), I can see the colors in: https://github.com/microsoft/vscode/blob/main/extensions/theme-monokai/themes/monokai-color-theme.json

   Some themes might have more than one json file, just pick the variation you want

4. Either use the colors directly out of the theme, or put those colors into a program like photoshop or photopea and tweak the hue/saturation/lightness/etc... so that it's not the exact same color.