Added QS guidelines to contribution guide
Added QS guidelines to contribution guide

sandrinodimattia/docs,hamzawi06/docs,yvonnewilson/docs,Annyv2/docs,sandrinodimattia/docs,yvonnewilson/docs,khorne3/docs,khorne3/docs,hamzawi06/docs,Catografix/docs,jeffreylees/docs,auth0/docs,sandrinodimattia/docs,khorne3/docs,Annyv2/docs,yvonnewilson/docs,Annyv2/docs,jeffreylees/docs,auth0/docs,hamzawi06/docs,jeffreylees/docs,Catografix/docs,Catografix/docs,auth0/docs