Add detailed intro on CLI readme (#264)

packages/cli/README.md

@@ -3,10 +3,17 @@
 <p align="center">
   <a href="https://ratemyopenapi.com/">
     <img src="https://cdn.zuplo.com/static/logos/logo.svg" height="70">
-    <h3 align="center">Rate My Open API</h3>
   </a>
 </p>
 
+At Zuplo we believe that the better the quality of an OpenAPI document, the
+better the developer experience will be for the consumers of that API. This
+experience is important for the success of an API.
+
+Rate My OpenAPI is a suite of tools designed to help software developers using
+OpenAPI to meet high standards of quality and usability when designing and
+developing their APIs.
+
 The CLI tool is perfect for developers who prefer working from the command line
 or need to integrate quality checks into their development workflow. It provides
 the same lint results as the website with the added benefit of it being easier