Quarto vscode extension cell color match theme background

[kylebutts]

I'm wondering if you all would welcome a small PR to the vscode extension to improve rendering of cells in quarto documents. I know that you can use cells.background.light/cells.background.dark to change the color, but this requires me to change this every time I switch themes. Adding an option cells.background.useTheme bool that would use notebook.selectedCellBackground theme color. This is a built in color for VSCode's notebooks and most themes will have a customized color.

I think it would be a relatively easy change adding a branch here.

quarto/apps/vscode/src/providers/background.ts

Lines 216 to 234 in 491057b

	const light = config.get("cells.background.light", "#E1E1E166");
	const dark = config.get("cells.background.dark", "#40404066");
	this.enabled_ = config.get("cells.background.enabled", true);
	this.delayMs_ = config.get("cells.background.delay", 250);
	if (this.backgroundDecoration_) {
	this.backgroundDecoration_.dispose();
	}
	this.backgroundDecoration_ = vscode.window.createTextEditorDecorationType({
	isWholeLine: true,
	light: {
	backgroundColor: light,
	},
	dark: {
	backgroundColor: dark,
	},
	});

See a similar patch to positron-code-cells extension: posit-dev/positron#6633

[kylebutts]

I assume this is good to close?

[juliasilge]

Yes! Closed in #679