Implement individual decision-making for staff agents whereby they can deviate from action cards

[thomasGodfrey]

• [ ] Rather than take the action card as strict requirements, staff can view what the action card suggests, then determine their action based on personal preferences
• [ ] Need to add the notion of preferences (perhaps starting with basic utility functions)
• [ ] Add 'success/failure' for action card actions. Rather than assume every action is completed successfully
• [ ] Add 'mitigation' actions for what staff should do if an action fails
• [ ] Currently, the user selects precisely what test is to be completed in action card actions. It should be possible to categorise tests such as 'point-of-care', 'lab test', 'COVID test'. As such, staff can choose between multiple options