Make it possible to reuse select options within the generated types

[cloetensbrecht]

We're using a select field with a huge list (4000+ items):

const myHugeSelectList = [...aLotOfItems]

const select: SelectField = {
	name: 'mySelect',
	label: 'My select',
	type: 'select',
	required: false,
	options: myHugeSelectList
}

When we use this field once in our project, it's fine. But when we use this field a second time, the payload generated types are listed twice. When we use this field multiple times within different blocks, the options are listed the same number of times.
This makes the generated payload types file huge!!

export interface Block {
  title: string;
  mySelect?:
    |  (
      | 'item1',
      | 'item2',
      | 'item3',
      | 'item4',
      | 'item5',
      | 'item6'
      // 4000+ items
    )
    | null;
}

export interface AnotherBlock {
  anotherBlockTitle: string;
  mySelect?:
    |  (
      | 'item1',
      | 'item2',
      | 'item3',
      | 'item4',
      | 'item5',
      | 'item6'
      // 4000+ items
    )
    | null;
}

Is there a way to define the types just once, just like the interfaceName property within a block type?
I would like to acheive something like this:

export type MySelect = (
  | 'item1',
  | 'item2',
  | 'item3',
  | 'item4',
  | 'item5',
  | 'item6'
  // 4000+ items
)

export interface Block {
  title: string;
  mySelect?:
    | MySelect
    | null;
}

export interface AnotherBlock {
  anotherBlockTitle: string;
  mySelect?:
    | MySelect
    | null;
}