Display project name when adding extensions

[xorye]

If there are two Quarkus projects in the workspace: quarkus-project-maven and quarkus-project-maven2, the quickpick after calling Quarkus: Add extension to current Quarkus Project, this quickpick appears:

This enhancement idea adds the project name alonsgide the path to pom.xml/build.gradle:

To get the project name, maybe we could have the microprofile/java/projectLabels command return not only the project uri, but the project name as well?

[xorye]

As mentioned in #204 (comment), currently we have the folder name being displayed instead than the project name