Add Hydrogen context provider for i18n overrides

[ruggishop]

WHY are these changes introduced?

Fixes #2507

useMoney and Money inside Hydrogen don't respect i18n localization params passed to the storefront context as those components take the localization data from a wrapping ShopifyProvider.

There are multiple possible ways of tackling this, with the spectrum going from introducing breaking changes, to adding renamed counterparts that receive explicit i18n data, to introducing a Hydrogen specific context that overrides the localization data. This PR implements the approach of the H2 context.

WHAT is this pull request doing?

• Introduce a new HydrogenContext that contains the i18n data (country and language codes).
• Update the useShop hook (used by useMoney) to override the context data coming from ShopifyProvider with the values coming from HydrogenContext (if present).
• Update the skeleton template's Layout function so that it wraps everything with HydrogenContext.Provider.

Checklist

• I've read the Contributing Guidelines
• I've considered possible cross-platform impacts (Mac, Linux, Windows)
• I've added a changeset if this PR contains user-facing or noteworthy changes
• I've added tests to cover my changes
• I've added or updated the documentation

[shopify]

Oxygen deployed a preview of your feat/fr-hydrogen-context-i18n branch. Details:

Storefront	Status	Preview link	Deployment details	Last update (UTC)
Skeleton (skeleton.hydrogen.shop)	✅ Successful (Logs)	Preview deployment	Inspect deployment	January 31, 2025 2:37 PM
metaobjects	✅ Successful (Logs)	Preview deployment	Inspect deployment	January 31, 2025 2:37 PM
third-party-queries-caching	✅ Successful (Logs)	Preview deployment	Inspect deployment	January 31, 2025 2:36 PM
custom-cart-method	✅ Successful (Logs)	Preview deployment	Inspect deployment	January 31, 2025 2:37 PM
classic-remix	✅ Successful (Logs)	Preview deployment	Inspect deployment	January 31, 2025 2:36 PM

Learn more about Hydrogen's GitHub integration.

[tomtuv]

Hi, just wanted to know if this will get merged soon? Thanks.

[blittle]

Nit picky, but we should be consistent on what these are called throughout Hydrogen:

1. https://github.com/Shopify/hydrogen/blob/main/templates/skeleton/app/lib/context.ts#L33
2. https://shopify.dev/docs/api/hydrogen/2025-01/utilities/getshopanalytics#getShopAnalytics-returns

[blittle]

If we introduce an official "ShopifyProvider", what does that mean for the AnalyticsProvider? Should that stay separate, or be included with the ShopifyProvider?