Review and enhance human task documentation

Focus on the Domain API usage.

• Documentation (jira)
• Transition Phase
• Complete / Abort
• Comments, Attachments
• Task Schema (internal)
• Input, Output
• Allowed phases transition

• Security
  • RHSSO == keycloak, target implementation
  • Default use security context 
• user/group as URL parameter (not default, but with some configuration)
• Integration with quarkus/spring security/ keycloak (new BAPL)
• Documentation (jira)

• Release task (set the task to a group)
• This is done using transition to phase using Release LifeCycle
• Documentation (in transition phase part)