docs(readme): add npm and prettier shields

README.md

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-# TELUS Design System [![Commitizen friendly](https://img.shields.io/badge/commitizen-friendly-brightgreen.svg)](http://commitizen.github.io/cz-cli/)
+# TELUS Design System [![npm](https://img.shields.io/npm/v/npm.svg)](https://www.npmjs.com/package/@telusdigital/tds)[![Commitizen friendly](https://img.shields.io/badge/commitizen-friendly-brightgreen.svg)](http://commitizen.github.io/cz-cli/)[![code style: prettier](https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat)](https://github.com/prettier/prettier)
 
 The TELUS Design System (TDS) is a set of living guidelines that communicates our brand promise through our digital experiences.
 It's a holistic platform that integrates documentation, guidelines and design management and that serves as single source for