Add open-banking.io (OBI) provider and vendor

[john-frandsen]

What

This PR adds open-banking.io (OBI) to the OpenFinTech provider and vendor databases, alongside comparable open banking providers already present such as yapily.

Why it belongs in the catalog

OBI is an open-source, certificate-free PSD2 open banking connector that provides unified bank account information (AIS) access across 30+ EU/EEA markets.

Most existing open banking entries in OpenFinTech (e.g. Yapily) describe regulated AISPs that an integrator connects to directly. OBI occupies a complementary and increasingly common niche: rather than requiring the integrator to hold their own eIDAS QWAC/QSeal certificates, it routes consented account-data requests through regulated Account Information Service Providers and aggregators. This substantially lowers the barrier to open banking adoption for fintechs, neobanks and treasury tools that lack a regulatory licence of their own, and is a meaningful category distinction worth representing in the database.

It also has a concrete, multi-language developer footprint, with maintained client SDKs on:

• NuGet (.NET)
• npm (Node.js)
• Maven Central (Java)
• PyPI (Python)
• Go module

Changes

Two purely additive changes, no existing entries modified:

data/payment_providers.json — new provider open-banking-io:

• vendor: open-banking-io
• payment_method: bank_transfer
• categories: aggregating
• countries: EU 27 + EEA EFTA (IS, LI, NO) + GB
• multilingual name and an English description

data/vendors.json — new vendor open-banking-io:

• links.website: https://open-banking.io/
• matching countries, name and description

Validation

• Both files remain valid JSON.
• Both entries satisfy schemas/payment_providers_schema.json and schemas/vendors_schema.json (required fields, code/vendor regex, status enum, translatable name, item regexes).
• provider.vendor correctly references the new vendor, and payment_method (bank_transfer) exists in data/payment_methods.json.
• The code open-banking-io is unique across both databases (no conflicts).
• Diff is strictly additive: +100 lines, 0 deletions.

Notes

• I did not have access to a usable brand asset, so the resources/payment_providers/open-banking-io/ and resources/vendors/open-banking-io/ logo/icon directories are intentionally omitted for now. This is consistent with a number of existing providers that have data entries without image assets; the generated doc page will simply render without a logo until one is supplied. Happy to add a logo in a follow-up if you can point me at an asset you'd like used.
• Happy to adjust the code slug (e.g. open_banking_io) or trim the country list if you'd prefer a different convention.