Add permissions for states or transitions

Here is a patch which adds and enforces permissions on transitions, per workflow.

I've attached a new patch that adds the access control to the widget as well, still need some tests. One of the existing tests did pick up the error below.

+++ b/src/Plugin/Validation/Constraint/WorkflowsFieldContraintValidator.php
@@ -61,6 +70,14 @@ class WorkflowsFieldContraintValidator extends ConstraintValidator implements Co
+      $transition = $workflow_type->getTransitionFromStateToState($previous_state, $field->state);

This is wrong it should have been $field->value.

Tests still failing because they trigger the new violation. Will pick it up tomorrow.

I pulled the constraint tests into their own class since they now handle users and permissions. I've added a new test for the constraint and additional tests for getSettableOptions. Everything should be green.

I don't see any permissions for each state. Do I need to do something special to turn on the permissions?

Nevermind, If anyone else is not seeing the permissions per state, you need to use the dev version of the module.