Support creating Micronaut projects

[dbalek]

Consider adding a support for creating Micronaut projects to the 'Java: Create Java Project...' command.
Micronaut projects can be created by calling the 'extension.micronaut.createProject' command provided by the GraalVM Tools for Micronaut ('oracle-labs-graalvm.micronaut') extension.
For more information on Micronaut, see https://micronaut.io/.
Thanks.

[jdneo]

Fixed by #757