license(CA-QC): add missing licenses for STM, STL, RTC, RTL, and Exo

[classabbyamp]

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

CA

License / Lizenz

CC BY 4.0 and custom

Source / Quelle

several

Notes / Anmerkungen

none

Träwelling Issue Link (optional)

[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)

[HerrLevin]

We can't currently comply with RTC Terms of Use because the attribution has to display the date, when the data has been crawled. That's currently not possible because of technical limitations. This has to be removed.

Please also provide the urls, where you found the information about the creative commons licenses in relation to the datasets, so we can verify it.