feat(runtime-core): support "exposed" type constraints via paradigm

[jason-chang]

[sxzz]

You can use satisfies operator with TypeScript 4.9 instead, to constraint exposed type. Also, please create an issue before PR.

For example:

defineComponent({
  setup(props, { expose }) {
    expose({
      foo: 1,
    } satisfies { foo: boolean })
  },
})

[jason-chang]

@sxzz Thanks for the suggestion, but if I use typescript before version 4.9, my decision should be in the right direction, right?

[sxzz]

@jason-chang Not really necessary.

defineComponent({
  setup(props, { expose }) {
    const exposed: Type = { foo: 1 }
    expose(exposed)
  },
})