Reset VS Dark + Light styling for meta embedded (#33866)

Fixes #33120

Adds rules to vs dark+light to reset style for meta embedded scopes. This is a proposed approach to support colorization of nested languages better

extensions/theme-defaults/themes/light_vs.json

@@ -3,6 +3,13 @@
 	"name": "Light (Visual Studio)",
 	"include": "./light_defaults.json",
 	"tokenColors": [
+		{
+			"scope": "meta.embedded",
+			"settings": {
+				"foreground": "#000000ff",
+				"background":"#ffffffff"
+			}
+		},
 		{
 			"scope": "emphasis",
 			"settings": {