Add market place support to contextual menus

[marcellobarile]

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

With https://github.com/camunda/web-modeler/issues/6066 we have introduced a new icon, to open the marketplace browse dialog, to the following contextual menus:
bpmn-create, bpmn-replace, bpmn-append, and element-template-chooser.
We did it by registering an extension provider for each of them: https://github.com/camunda/web-modeler/blob/da75c66b3009763a84f7978d0c624c3f6488cba0/webapp/src/App/Pages/Diagram/BpmnJSExtensions/browseMarketplaceExtension/BrowseMarketplaceExtension.js#L29-L32

We have also added a new call to action when there are no search results, and we did it by listening for mutations on the DOM node: https://github.com/camunda/web-modeler/blob/da75c66b3009763a84f7978d0c624c3f6488cba0/webapp/src/App/Pages/Diagram/BpmnJSExtensions/browseMarketplaceExtension/BrowseMarketplaceExtension.js#L74C3-L91C4

The second approach, looks error-prone and hard to maintain (e.g. what if selectors change in the core libraries?); but at that time it was the only viable solution to achieve the requirement.

Describe the solution you'd like

Do we have, or might implement, something better to add the marketplace icon?
Would it be possible to expose something (e.g. a rendering function) to customize or extend the search results?

Additional context

PR with changes: https://github.com/camunda/web-modeler/pull/6154/files#

What does it look like:

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Depends on bpmn-io/diagram-js#846

[nikku]

Moving to ready to un-park this item.

[nikku]

@marcellobarile Via bpmn-io/diagram-js#847 you'll be able to create a popup menu provider that contributes a custom empty state. This way you shall be able to implement your use-case.

[marcellobarile]

great news @nikku ! I'll prepare an issue on our end to embrace the change! :)

[nikku]

Will be released with [email protected] and has to be integrated.