feat(core): Compact mode introduction #59

[nandorholozsnyak]

• Compact mode introduction
• Changes in the site plugin version
• Very first IT test for the maven plugin

Closes #59

[nandorholozsnyak]

Antora was introducing a new compact mode, and the team was hard at work to make sure it was perfect. They reworked the templates, tested it, and updated the Maven Wrapper and build profile. Finally, they added docs with examples so everyone could use the new compact mode. It was a great success! _{Created by Commit Teller}