Replace direct use of fs by vscode.workspace

Author: pderaaij

packages/foam-vscode/src/features/preview/wikilink-embed.ts

@@ -1,7 +1,6 @@
 /*global markdownit:readonly*/
 
 // eslint-disable-next-line no-restricted-imports
-import { readFileSync } from 'fs';
 import { workspace as vsWorkspace } from 'vscode';
 import markdownItRegex from 'markdown-it-regex';
 import { isSome, isNone } from '../../utils';
@@ -177,7 +176,7 @@ function fullExtractor(
   parser: ResourceParser,
   workspace: FoamWorkspace
 ): string {
-  let noteText = readFileSync(note.uri.toFsPath()).toString();
+  let noteText = vsWorkspace.fs.readFile(toVsCodeUri(note.uri)).toString();
   const section = Resource.findSection(note, note.uri.fragment);
   if (isSome(section)) {
     const rows = noteText.split('\n');
@@ -194,7 +193,7 @@ function contentExtractor(
   parser: ResourceParser,
   workspace: FoamWorkspace
 ): string {
-  let noteText = readFileSync(note.uri.toFsPath()).toString();
+  let noteText = vsWorkspace.fs.readFile(toVsCodeUri(note.uri)).toString();
   let section = Resource.findSection(note, note.uri.fragment);
   if (!note.uri.fragment) {
     // if there's no fragment(section), the wikilink is linking to the entire note,