Can't stop, won't stop, they said, huh?
This makes it easier to spot syntax errors when editing the class reference. The schema is referenced locally so validation can still work offline. Each class XML's schema conformance is also checked on GitHub Actions.
A few extra renames for classes which were missed in last week's PRs.
Rémi Verschelde
Hugo Locurcio
Aaron Franke
Pedro J. Estébanez