chore(documentation) Adds links to github contribution and issues
chore(documentation) Adds links to github contribution and issues

[Finishes #99644074]

CanopyCloud/pivotal-ui,pivotal-cf/pivotal-ui,sjolicoeur/pivotal-ui,CanopyCloud/pivotal-ui,npm/pivotal-ui,sjolicoeur/pivotal-ui,sjolicoeur/pivotal-ui,CanopyCloud/pivotal-ui,pivotal-cf/pivotal-ui,pivotal-cf/pivotal-ui,npm/pivotal-ui,sjolicoeur/pivotal-ui,npm/pivotal-ui