feat(modeler): add input type dropdown

[djoysilva]

Proposed Changes

Include on canvas a select type reference dropdown for Input Data.

A select control (TypeRefDropdown) is rendered as an overlay on Input Data element on the canvas. The overlay is managed by TypeRefBehavior which shows the dropdown on element click/created.

Purpose

Let users changes the element's typeRef variable directly on the canvas without the need for using the properties panel

Component changes:
[NEW] TypeRefDropdown: renders the select control and calls
[NEW] TypeRefBehavior: manages the overlay UI, build options (via dataTypes + translate) and updates the model (via modeling) when the dropdown changes.

dmn-js-drd lib: Imports and registers TypeRefBehavior in index.js
dmn-js-drd tests: DRD tests were updated to import overlays and dataTypes modules required by the new behavior.

Step by step for manual test:

1- Drag and drop the InputData element on the canvas
2 - You should see the dropdown with type reference options
3 - Select a type reference
4 - Click in a different element on the canvas, you shouldn't see the dropdown on InputData anymore
5 - Click on InputData element again and it should show the dropdown with the same selected type reference
6 - Any changes on the type reference for a specific InputData, should be reflected on it's variable.typeRef element in the xml file

Checklist

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  • [x ] Link to related issue(s), i.e. Closes {LINK_TO_ISSUE} or Related to {LINK_TO_ISSUE}
  • [x ] Brief textual description of the changes
  • [x ] Screenshots or short videos showing UI/UX changes
  • [x ] Steps to try out, i.e. using the @bpmn-io/sr tool

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