Add CRTM Madrid GTFS feed and proprietary license

[6447-netizen]

License Template / Lizenz Vorlage

• I have read the license requirements in the README and I am sure that my contribution is compliant with the license requirements.
• I have checked my contribution for syntax errors

Country / Land

Spain

License / Lizenz

CRTM Madrid https://www.crtm.es/licencia-de-uso

Source / Quelle

https://crtm.maps.arcgis.com/home/item.html?id=885399f83408473c8d815e40c5e702b7#overview

Notes / Anmerkungen

[github-actions]

Thank you for contributing a license to Träwelling! We'll review your pull request soon.

Here's our internal review checklist:

License requirements

• The license allows use, redistribution, and modification of the data
• The license does not require royalties or usage fees
• The license is not specific to a product or technology
• Any restrictions are clearly stated

Technical checks

• The source filename matches exactly what appears on traewelling.de/debug/motis-sources
• The data source URL is reachable and correct (or null and not relevant)