Add expo-store-country

[Navipro70]

Adds expo-store-country — an Expo module that returns the active App Store storefront (iOS) or Play Store billing country (Android) as a lowercase ISO 3166-1 alpha-2 code (e.g. "us", "de").

• iOS: StoreKit 2 Storefront.current
• Android: BillingClient.getBillingConfigAsync
• Web: Intl.Locale region from navigator.language
• Built on expo-modules-core, New Architecture ready
• npm: https://www.npmjs.com/package/expo-store-country (v1.0.0)

[Navipro70]

The test job failure is the known 24h npm downloads API propagation lag for freshly published packages, which your validation script itself documents:

For the new packages recently published for the first time, npm API can return non-existing package error. The resolution here is to wait up to 24h, and then re-trigger the CI workflow.

The package is live on the registry: https://www.npmjs.com/package/expo-store-country — npm view expo-store-country version returns 1.0.0. I'll push an empty commit in ~24h to re-run the check, or feel free to re-run it manually.

[Simek]

Hey @Navipro70, thanks for adding a new package to the directory! 👍