Update README.md with Clean Code link (#154)

https://docs.google.com/document/d/1XhLeIhXWOzyWGJlJYp9OqYbkP5KQ-Gvx1a0O5JHTQsY/edit

Author: david-cho-lerat-sonarsource

README.md

@@ -1,10 +1,12 @@
 # SonarQube Scanner Commons
 
-Common library used by many Scanners (SQ Scanner, SQ Scanner for Maven, SQ Scanner for Gradle, SQ Scanner for Ant, ...). Used to programmatically run SQ analysis.
+Common library used by many Scanners (SQ Scanner, SQ Scanner for Maven, SQ Scanner for Gradle, SQ Scanner for Ant, ...).
+
+Used to programmatically run SQ analysis to help developers write [Clean Code](https://www.sonarsource.com/solutions/clean-code/?utm_medium=referral&utm_source=github&utm_campaign=clean-code&utm_content=sonar-scanner-commons).
 
 ![Build Status](https://api.cirrus-ci.com/github/SonarSource/sonar-scanner-api.svg)
 
-## Have Question or Feedback?
+## Have Questions or Feedback?
 
 For support questions ("How do I?", "I got this error, why?", ...), please head to the [SonarSource forum](https://community.sonarsource.com/c/help). There are chances that a question similar to yours has already been answered.