[FEAT] When the bpmn file contains more than one diagram, allow to choose the diagram to be loaded #729
Description
In bpmn-visualization@0.6.0, the library displays the first BPMN Diagram found in the BPMN input source (see #510).
There is currently no way to choose a specific one when the source contains several diagrams.
By configuration, the developer integrating the library (Fred) could have a possibility to identify them with information used as parameters.
In the implementation example, we should be able to show that using a BPMN file with more than 2 diagrams, Fred could use a way to identify the diagrams, pass that information to the library, and display the specific diagram.
Linked to #592
API proposal: see #729 (comment)