Enable react snippets on VS Code for web

[tanhakabir]

Hey @dsznajder 👋

I'm part of the VS Code team and we recently launched VS Code for the web with vscode.dev! You can read the full guide for extension authors creating and migrating extensions here: Web Extensions

In hopes to help you migrate I helped make the changes necessary to make your extensions work on the web. Here's the full guide on web extension authoring

The changes I made:

• Added webpack bundling to bundle your extension into 1 JavaScript file for the web.
  • Learn more about bundling from our bundling extension docs and the webpack docs.
• Added the compile scripts for webpack to your package.json
• Added the necessary dependencies for bundling
• Added the browser entry point to your package.json to link to the web-friendly compiled extension

You can test my changes with these three ways.

Fixes #196