If you have the right classpath setup in IntelliJ
Looks like the included run configuration only includes the new server module's classpath, which doesn't have any dependencies other than start.jar?
When I run the solrcloud run configuration, I get java.io.FileNotFoundException: /Users/sarowe/git/lucene-solr/solr/server/solr-webapp/webapp - so I'm not sure what the benefit of this over bin/solr is? That is, you still have to use the ant build to populate server/solr-webapp/webapp.
Are you planning to flesh this out more? I think it's possible, with the right module dependencies, and maybe also making the build/run location under idea-build/solr/server/, to get a setup that will use IntelliJ's build artifacts.
I'm not sure how to create collections... I think I need to get the configset examples into ZK somehow?
Maybe a bootstrapping task to run SolrCLI's ZK upconfig?