Introducing Goa Guru on Gurubase.io (#3612)

* Introducing Goa Guru on Gurubase.io

Signed-off-by: Kursat Aktas <kursat.ce@gmail.com>

* fix

---------

Signed-off-by: Kursat Aktas <kursat.ce@gmail.com>
Co-authored-by: Raphael Simon <simon.raphael@gmail.com>

README.md

@@ -9,6 +9,7 @@
     <a href="https://github.com/goadesign/goa/actions/workflows/ci.yml"><img alt="GitHub Action: Test" src="https://img.shields.io/github/actions/workflow/status/goadesign/goa/test.yml?branch=v3&style=for-the-badge"></a>
     <a href="https://goreportcard.com/report/github.com/goadesign/goa"><img alt="Go Report Card" src="https://goreportcard.com/badge/github.com/goadesign/goa?style=for-the-badge"></a>
     <a href="/LICENSE"><img alt="Software License" src="https://img.shields.io/badge/license-MIT-brightgreen.svg?style=for-the-badge"></a>
+    <a href="https://gurubase.io/g/goa"><img alt="Gurubase" src="https://img.shields.io/badge/Gurubase-Ask%20Goa%20Guru-006BFF?style=for-the-badge"></a>
     </br>
     <a href="https://gophers.slack.com/messages/goa"><img alt="Slack: Goa" src="https://img.shields.io/badge/Goa-gray.svg?longCache=true&logo=slack&colorB=red&style=for-the-badge"></a>
     <a href="https://invite.slack.golangbridge.org/"><img alt="Slack: Sign-up" src="https://img.shields.io/badge/Signup-gray.svg?longCache=true&logo=slack&colorB=red&style=for-the-badge"></a>