Repository: storybook
Issue: [Bug]: Support of default Angular's inputs
Labels: bug,help wanted,angular

### Describe the bug

I just updated to the latest Angular (18.2.9) and Storybook (8.3.6) and was surprised to find that it doesn't support signals

I found a lot of discussions, but they all talk about input and output signals. I'm talking about a simple `signal(...)`

I found [this](https://github.com/storybookjs/storybook/pull/26413) and [this](https://github.com/storybookjs/storybook/pull/26546). 
And I even see that you supported `model()`.
But I don't understand why regular `singal(...)` is not supported? 

Storybook has always allowed you to work with component fields without requiring you to make them inputs.
this makes sense because public fields are what html uses. But inputs are a contract with the outside world.


### Reproduction link

https://stackblitz.com/edit/github-mbwd5e-mebzvr?file=src%2Fapp%2Fsignal-ex%2Fsignal-ex.stories.ts

### Reproduction steps

example: https://stackblitz.com/edit/github-mbwd5e-mebzvr?file=src%2Fapp%2Fsignal-ex%2Fsignal-ex.stories.ts

let's say I have a component with a field.
this field can be updated asynchronously. Previously I had to use `BehaviorSubject` for this and I could override the value from Storybook.
now I want to use `signal()`.
Storybook does not work with `signal`, but it works with `model`

``` typescript
@Component({
  selector: 'signal-ex',
  standalone: true,
  imports: [CommonModule],
  template: `Field: {{ field }} <br> Signal: {{ signalField() }} <br> Model: {{ modelField() }}`,
  styleUrls: [],
})
export class SignalExComponent {
  field = false;     // <- we can't use fields with ChangeDetection.OnPush
  field$ = new BehaviorSubject<boolean>(false);
  fieldSignal = signal(false);
  fieldModel = model(false);

  toggle() {
    this.field = true;
    this.field$.next(true);
    this.fieldSignal.set(true);
    this.fieldModel.set(true);
  }
}


```
story:
``` typescript
const meta: Meta<SignalExComponent> = {
  component: SignalExComponent,
  tags: ['autodocs'],
};

export default meta;
type Story = StoryObj<SignalExComponent>;

export const Primary: Story = {
  args: {
    field: true,
    field$: new BehaviorSubject<boolean>(true),
    fieldSignal: true as any,    // <- doesn't work
    fieldModel: true,
  },
};


```

### System

Storybook Environment Info:

  System:
    OS: Windows 11 10.0.22631
    CPU: (20) x64 13th Gen Intel(R) Core(TM) i7-13700H
  Binaries:
    Node: 20.11.1 - C:\Program Files\nodejs\node.EXE
    npm: 10.2.4 - C:\Program Files\nodejs\npm.CMD <----- active
  Browsers:
    Edge: Chromium (129.0.2792.79)
  npmPackages:
    @storybook/addon-a11y: ^8.3.5 => 8.3.6
    @storybook/addon-actions: ^8.3.5 => 8.3.6
    @storybook/addon-essentials: ^8.3.5 => 8.3.6
    @storybook/addon-interactions: ^8.3.5 => 8.3.6
    @storybook/addon-links: ^8.3.5 => 8.3.6
    @storybook/addons: ^7.6.17 => 7.6.17
    @storybook/angular: ^8.3.5 => 8.3.6
    @storybook/core-server: 8.3.5 => 8.3.5
    @storybook/testing-library: 0.2.2 => 0.2.2
    chromatic: ^11.12.5 => 11.16.1
    msw-storybook-addon: 2.0.3 => 2.0.3
    storybook: 8.3.6 => 8.3.6
    storybook-addon-pseudo-states: ^4.0.2 => 4.0.2

### Additional context

_No response_