Add source map for every possible element in the Markdown preview (#134799)

* Update markdown-it and type definitions

* Refresh the source map mechanism in `markdownEngine.ts`

extensions/markdown-language-features/notebook/tsconfig.json

@@ -3,6 +3,7 @@
 	"compilerOptions": {
 		"outDir": "./dist/",
 		"jsx": "react",
+		"moduleResolution": "Node",
 		"module": "es2020",
 		"lib": [
 			"es2018",