feat: add task listeners for Zeebe

[misiekhardcore]

related to camunda/camunda-modeler#4590

Proposed Changes

Add task listener to user task.

• task listeners are allowed only for zeebe user tasks
• event can be set to complete or assignment
• listener type and number of retries can be set

Screencast.from.2024-11-07.13-56-29.webm

can be tested with npm start on the branch

Checklist

To ensure you provided everything we need to look at your PR:

• Brief textual description of the changes present
• Visual demo attached
• Steps to try out present, i.e. using the @bpmn-io/sr tool
• Related issue linked via Closes {LINK_TO_ISSUE} or Related to {LINK_TO_ISSUE}