[User Story] Add a JSON Editor view

[chrisdburr]

User Role

Assurance Case Developer

Goal / Desire

To be able to switch to edit an assurance case using JSON directly.

Benefit / Reason

If I prefer plain text editing, over a GUI, I can still create or edit an assurance case.

Acceptance Criteria

• As a logged in user with a new or existing assurance case, I have the option to change default view to JSON editor.
• When I make changes to the JSON, and switch back to the graphical editor, my revisions are reflected.
• If there are syntax errors, I am notified of where the problem occurs.

Additional Notes / Considerations

This will require schema validation to be in place.