Which @angular/* package(s) are relevant/related to the feature request?

common

Description

input.required() returns the same typescript type as input() which makes it difficult to statically analyze which inputs are required and which are optional.
If input.required() returned some other branded type, for example RequiredInputSignal<T> we could then devise a type such as:

type ComponentInput<T> = ... // not shown here, see TS Playground link

function render<T>(component: Type<T>, inputs: ComponentInput<T>) {
}

class Component {
  name = input.required<string>();
  birthday = input<Date>();
}

// works
render(Component, { 
  name: 'hello',
  birthday: new Date()
})

// shows error because name is required
render(Component, { 
  birthday: new Date()
})

// works because birthday is optional
render(Component, { 
  name: 'hello',
})

// error because there's no foo
render(Component, { 
  name: 'hello',
  foo: 'bar'
})

TS Playground link

Proposed solution

input.required() should return a different typescript branded type than input() .
See this playground: demo

Alternatives considered

None exist