chore: Add Citrus catalog generator implementation

- Remove Maven based Citrus catalog loading mechanism and replace with catalog generator implementation
- Introduce interface for CatalogGenerator and CatalogGeneratorBuilder
- Use catalog generator implementations for Citrus and Camel based on the catalog runtime
- Citrus catalog files are added just like any other catalog runtime (Main, Quarkus, SpringBoot)
- Generator loads Citrus catalog resources from Maven central
- index.js holds the Citrus versions to include into catalog (at the moment 4.9.2)

Author: christophd