Add ip2geo IP geolocation provider

[bfzli]

Summary

• Adds a new provider for the ip2geo IP geolocation API
• Supports geocoding IPv4 and IPv6 addresses
• Custom Ip2GeoAddress model with 20+ extra fields (ASN, currency, flag, continent, registered country, etc.)
• Full unit test suite with mocked HTTP responses
• Integration test scaffold (requires IP2GEO_API_KEY env var)
• CI workflow for PHP 8.0–8.5

Provider details

• API endpoint: GET https://api.ip2geo.dev/convert?ip={ip}
• Authentication: X-Api-Key header (API key required, free tier available at ip2geo.dev)
• Operations: Geocode (IP only) — no street address or reverse geocoding support

Files added

src/Provider/Ip2Geo/
├── .github/workflows/provider.yml
├── .gitignore
├── CHANGELOG.md
├── Ip2Geo.php              # Main provider class
├── Ip2GeoAddress.php        # Custom address model
├── LICENSE
├── README.md
├── Tests/
│   ├── .cached_responses/.gitkeep
│   ├── IntegrationTest.php
│   └── Ip2GeoTest.php
├── composer.json
└── phpunit.xml.dist

Test plan

• php -l passes on all PHP files
• composer install && vendor/bin/phpunit — 10 unit tests pass, 11 integration tests skip (no API key)
• Live API test with real key returns correct data (city, country, coordinates, ASN, currency, etc.)
• CI workflow validates against PHP 8.0–8.5