Don't show integrations from distant places by default

[Ginden]

The list of integrations using geographically local APIs is steadily growing, which is positive. However, this also leads to visual bloat, as the list becomes increasingly long.

To address this, I propose adding a new field to each component’s manifest.json: region.

This field would contain a list of relevant regions, formatted either as an ISO 3166-1 alpha-2 country code (e.g., FR) or a country code followed by a comma and an arbitrary string for subregions (e.g., US, Texas).

Based on the user's configured home location, integrations that are only applicable to other regions would be hidden from the default view, but still available through search. For example, it is unlikely that a user would simultaneously need both City of Austin Utilities and Spain Electricity Hourly Pricing.

If the region field is omitted, the integration is assumed to be globally relevant.