Allow preferences for using React.FC or props interfaces

[JoshuaKGoldberg]

Given this React component:

const MyComponent = ({ greeting, name }) =>
    return `${greeting}, ${name}!`;

Should the MyComponentProps be added as...

• { greeting, name }: My ComponentProps
• MyComponent: React.FC<MyComponentProps>

Following #170, there should be a configuration within incompleteTypes to allow one or the other. This will necessitate making the fixes.incompleteTypes allow a complex object in addition to a boolean.