Should this repo have explicit license information?

[apasel422]

In particular, it might be helpful for implementations that wish to automatically import the end-to-end tests.

[martinthomson]

https://www.w3.org/copyright/software-license-2023/ is the governing license for the specification. That can probably cover the code also. That does have a requirement for this to appear somewhere. I don't see why that couldn't be added to a LICENSE.md file.