Allow Examiner to add or remove a Co-Host or Property Manager

## Use Cases

As an Examiner
I want the ability to remove a Co-host from a Registration
So that the list of individuals associated with the registration can remain accurate.

As an Examiner
I want the ability to add a Co-host from a registration
So that the list of individuals associated with the registration can remain accurate.

As an Examiner
I want the ability to remove a Property Manager from a Registration
So that the list of businesses associated with the registration can remain accurate.

As an Examiner
I want the ability to remove a Property Manager from a Registration
So that the list of businesses associated with the registration can remain accurate.

## Acceptance Criteria

- [ ] **Scenario: Examiner successfully removes a Co-host from a registration**
- Given an Examiner is logged in and viewing a registration that has an assigned Co-host
- When the Examiner selects an existing Co-host and initiates the removal action
- Then the selected Co-host is successfully unlinked from the registration
- And the Co-host no longer appears in the list of individuals associated with that registration
- And the system provides a confirmation of the successful removal

- [ ] **Scenario: Examiner successfully adds a Co-host to a registration**
- Given an Examiner is logged in and viewing a registration
- When the Examiner initiates the action to add a Co-host and selects a valid individual to assign
- Then the selected individual is successfully linked as a Co-host to the registration
- And the new Co-host appears in the list of individuals associated with that registration
- And the system provides a confirmation of the successful addition

- [ ] **Scenario: Examiner successfully removes a Property Manager from a registration**
- Given an Examiner is logged in and viewing a registration that has an assigned Property Manager
- When the Examiner selects an existing Property Manager and initiates the removal action
- Then the selected Property Manager is successfully unlinked from the registration
- And the Property Manager no longer appears in the list of businesses associated with that registration
- And the system provides a confirmation of the successful removal

- [ ] **Scenario: Examiner successfully adds a Property Manager to a registration**
- Given an Examiner is logged in and viewing a registration
- When the Examiner initiates the action to add a Property Manager and selects a valid business/individual to assign
- Then the selected business/individual is successfully linked as a Property Manager to the registration
- And the new Property Manager appears in the list of businesses associated with that registration
- And the system provides a confirmation of the successful addition