feat: add support for doublequote escape

Author: Ben Force

src/previewContentProvider.ts

@@ -39,13 +39,11 @@ export class VelocityPreviewProvider
 
     const content = editor?.document?.getText() ?? ``;
 
-    const parser = new Parser(content);
+    const parser = new Parser(content.replace(/""/g, `\\"`));
 
     return parser.resolve({});
   }
 
-  async updatePreview() {}
-
   async onContentUpdated(
     event?: vscode.TextDocumentChangeEvent | vscode.TextEditor
   ) {