Make Kamelet Catalog examples to use Camel JBang

[squakez]

I think that we should change the template used to show a user how to run a Kamelet/KameletBinding. Ideally we should change it to use Camel JBang instead, as now Kamelet technology is not specifically bound to Camel K. It would also simplify a lot the user to try them out, not requiring to have installed a Kubernetes cluster.

[oscerd]

I added a section with a little explanation. Still need to work on the javascript for generating specific examples.