The current maitake docs say that unwinding is not supported.

In this embassy discussion, we outline why this is, and how to fix it.

We should probably take tokio's mitigations, gated to only be enabled when the std feature is enabled.

We may also need to do the same for some of the mutex crate impls as well, to ensure that the mutex is unlocked on panic.

CC @hawkw if I missed anything, I'll try and take a crack at this over the weekend.