title: Where are added archetypes stored in IntelliJ?
body: <p>When creating a Maven-based project/module in IDEA you can click "Add archetype".  Where are these new archetype values stored?  I looked in my ~/.m2/repository but I don't think that's it…</p>
  
  <p>Bonus question: what are the best practices around "Add archetype"?  Just curious.  I'm prone to skipping this in IDEA and just using mvn from the command line.</p>