Within project, composite components are located in folder %Web-root%/resources. - That is supported by JBoss Tools.
But besides, composite components may be located in used by the project external jars and class folders in folder META-INF/resources. - That was implemented for jar files but not for class folders.
JavaServerTM Faces Specification
220.127.116.11 Packaging Resources into the Classpath
For the default implementation, resources packaged in the classpath must reside under the JAR entry name: