Vaadin Quarkus add-on 2.1.0.alpha2

This version targets Vaadin 24.5+ and Quarkus 3.12+

Changes since 2.1.0.alpha1:

• chore: improve extension metadata by @mcollovati in #170
• fix: index optional dependencies by @mcollovati in #172

Full Changelog: 2.1.0.alpha1...2.1.0.alpha2