types(runtime-core): improve the extracted instance types

[HcySunYang]

When using InstanceType to extract the component instance type and read props on it, the types of its props with default fields can still be undefined:

const Comp = defineComponent({
    props: {
        foo: {
            type: String,
            default: ''
        }
    }
})

const vm: = {} as InstanceType<typeof Comp>

vm.foo // string | undefined

This PR improves that.

[pikax]

You don't need to change the types, you can rebuild the instance types without changing the code:

const Comp = defineComponent({
  props: {
    foo: {
      type: String,
      default: ''
    }
  }
})

type BuildInstance<T> = T extends ComponentOptionsBase<
  infer Props,
  infer RawBindings,
  infer D,
  infer C,
  infer M,
  infer Mixin,
  infer Extends,
  infer E
>
  ? ComponentPublicInstance<Props, RawBindings, D, C, M, Mixin, Extends, E>
  : T

cc.foo // string

The constructor makes the props optional for the tsx.

I have this PR which should make a bit easier to maintain the DefineComponent types and also provide a better type extraction.

In this case I would recommend having a core type used to extract those types for the user land.

[HcySunYang]

Is it this one: #1883? I just noticed it, I will close this PR.

[pikax]

Yep.

Forgot to paste the link 🤦‍♂️

[pikax]

The changes on the Public instance types are not necessary, you can just add them on defineComponent:

ComponentPublicInstanceConstructor<
  CreateComponentPublicInstance<
    ExtractPropTypes<PropsOptions, false>,
    RawBindings,
    D,
    C,
    M,
    Mixin,
    Extends,
    E,
    VNodeProps & AllowedComponentProps & ComponentCustomProps
  > 
& Readonly<ExtractPropTypes<PropsOptions, true>> // add this line to the `defineComponent` overloads
>