Respect optional fields in select options

[chrisvxd]

Puck does not allow optional values in select fields.

Steps to reproduce

Add an optional value with a select field

Code example

type Props = {
  MyComponent: {
    fruit?: 'apple' | 'banana' // Make optional with `?`
  }
}

const conf: Config<Props> = {
  components: {
    MyComponent: {
      fields: {
        fruit: {
          type: "select",
          options: [
            { label: '', value: undefined }, // Should work because `fruit` is optional
            { label: 'Apple', value: 'apple' },
            { label: 'Banana', value: 'banana' },
          ]
        }
      }
    }
  }
}

What happened

TS complains that undefined is not a valid value for fruit

What I expected to happen

TS would not complain because fruit is optional in the Props type.