Whitespace characters render over the top of decorations

[DanTup]

If you insert some "floating" text using a decorations before/after properties, it's rendered underneath the whitespace markers:

decorations.push({
	range: new vs.Range(
		new vs.Position(line, anchorPoint),
		new vs.Position(line, anchorPoint),
	),
	renderOptions: {
		after: {
			color: "#6666ff",
			contentText: "SOME TEXT",
			width: "0",
		},
	},
});

For my real use case, I'm drawing markers between text so it appears like this:

I can imagine for some use cases this might be preferred (for ex. things like the indent rainbow extension), but I think it'd also be useful to be able to draw over the top.

[alexdima]

Let's continue tracking in #73780