docs(aya): Document more breaking changes

[dave-tucker]

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[alessandrod]

PerfEvent::attach has changed too
and PerfEvent::detach #522

Ok I think it's probably going to be like another month if we try to document every single change 😅 I guess it's fine if exceptionally for this release we only document the major changes, then once we have automation to track changes we can be more strict.

[dave-tucker]

exceptionally for this release we only document the major changes, then once we have automation to track changes we can be more strict.

🙏 Thanks!
I've got most of them now I think, but I'll document the perf_event ones also before merging this one.