OWD project: 100% complete BCD API data (no true/null values)

[foolip]

This is a project corresponding to mdn/browser-compat-data#6369 which I and @queengooborg have been working for over a year now. We hope to get to 98% complete by the end of September, and make the push for 100% by the end of the year.

That final push will involve many tricky cases and some compromises, and I think we would really benefit from a shared goal to get it done.

The work can be simplified as ensuring that there are no true or null values in https://github.com/mdn/browser-compat-data/tree/main/api, but the actual strategy is to divide it into categories that can be tackled effectively together, such as event data.

[Elchi3]

This got done! Congrats @queengooborg and @foolip 🎉