fix(runtime-core): force evalutating SetupContext type (fix #2362)

[sapphi-red]

It seems like TypeScript does not evaluate type when it is in an object.

type IfAny<T> = T extends any ? true : false

type Box<T> = {
    value: IfAny<T>
}

declare let a: Box<number>
declare let b: Box<string>

a = b // error (Actually, both becomes `true` so it should be ok)

TS Playground

To fix #2362, I changed it using T extends any ? .

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[unitydynamics]

This change broke userland types that extends SetupContext. My code that type-checks emit signatures no longer works.

I had this utility interface:

interface SetupContextExtended<Event extends Record<string, any>> extends SetupContext {
   emit: <Key extends keyof Event>(event: Key, payload: Event[Key]) => void;
}

And I was using it with event interface types to ensure emits were well type-checked.

Is there a more official way of type-checking emits now? I'm using old style script rather than script setup