Add support providedIn: 'platform'

[MillerSvt]

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

signals

Information

Please add support providedIn: platform within signalStore().

Describe any alternatives/workarounds you're currently using

signalStore(
    {
        // @ts-expect-error
        providedIn: `platform`,
    },
    ...
);

I would be willing to submit a PR to fix this issue

• Yes
• No

[markostanimirovic]

@MillerSvt feel free to raise the PR if you're interested.