Add Link to VSCode extension

Author: mhegazy

README.md

@@ -3,6 +3,8 @@
 
 This repository contains TmLanguage files that are consumed by TypeScript editors and plugins such as [Visual Studio Code](https://github.com/Microsoft/vscode), [The TypeScript Sublime Plugin](https://github.com/Microsoft/TypeScript-Sublime-Plugin), [Atom TypeScript](https://github.com/TypeStrong/atom-typescript), and possibly others.
 
+Latest version of the grammer can be also found as a [VSCode extension](https://marketplace.visualstudio.com/items?itemName=ms-vscode.typescript-javascript-grammar).
+
 # Contributing
 
 The XML files are generated from the YAML files, so contributors should hand-modify the YAML files, and XML files should only be generated by running build script.