[FEAT] In Plugins exposing API with "names parameters", provide a way to filter/deduplicate elements related to names

[tbouffard]

Is your feature request related to a problem? Please describe.

The existing StyleByNamePlugin relies on the getElementsByNames method of BpmnElementsSearcher to get the elements related to names using what has been introduced in #134.
But currently, it doesn't allow to deduplicate the elements that match the same name as this is possible to do in getElementByName method (https://github.com/process-analytics/bpmn-visualization-addons/blob/09b0e545706badfaab38cd1f5c49c963c7bdc53b/packages/addons/src/bpmn-elements.ts#L62C3-L62C19)

Describe the solution you'd like

Provide a way in the plugin to filter or deduplicate elements.
This could be a configuration of the plugin itself (done when instantiating the plugin and configured with the BpmnVisualization configuration) or a parameter of the methods of the plugin.
This has to be decided.