Integrate camunda-bpmn-js

[AlexanderSkrock]

Describe the solution you'd like

In Addition to the basic implementation provided by bpmn-js, we could also provide react integrations for camunda-bpmn-js. Another option would be to publish this as a separate module camunda-bpmn-react. For the sake of simplicity, we could do this within this package's scope for now.

Additional context

Github reference: https://github.com/camunda/camunda-bpmn-js

[AlexanderSkrock]

Thinking more on this, we could make use of peerDependenciesMeta (see npm docs) to allow the consumer to speficy the version of camunda-bpmn-js and minimize dependencies for other usages.

[AlexanderSkrock]

To keep the scope of this project cleanly defined, we could also implement #27 and add a story on how to use camunda-bpmn-js with this library.