feat(core): Only use shipping address for tax zone determination

[martijnvdbrug]

Description

When determining a tax zone, we should only use the shipping address, not the billing address. According to EU regulations you pay taxes in the country where you ship the products to.

Do you sell, deliver and ship goods from the Netherlands to consumers in other EU countries? Then you usually charge the VAT of the EU country where your products go
Source: https://www.kvk.nl/en/international/vat-rules-for-e-commerce-in-the-eu/

Checklist

📌 Always:

• I have set a clear title
• My PR is small and contains a single feature
• I have checked my own PR

👍 Most of the time:

• I have added or updated test cases
• I have updated the README if needed

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Updated (UTC)
docs	✅ Ready (Inspect)	Visit Preview	Feb 14, 2025 0:55am

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud