[FEAT] Render User task #143
Description
Is your feature request related to a problem? Please describe.
Render the User task with the BPMN standard.
Describe the solution you'd like
Create a new MxGraph Shape.
BPMN specification
Depends on #142.
A User Task is a rounded corner rectangle that MUST be drawn with a single thin line and includes a human figure marker that distinguishes the shape from other Task types (as shown in Figure 10.17).
