Update to embedded-hal 1.0

[qwandor]

Now that the new version of microbit-v2 and friends are finally released, we can use embedded-hal 1.0 for the bare metal morning.

[randomPoison]

I just merged a couple of PRs that bump the crate version, but I'd like to merge your cleanup of embedded-hal.md. @qwandor can you rebase this on top of main? I'll approve and merge after that :)

[qwandor]

We can't update to embedded-hal 1.0 until the microbit crate updates to support it. I've sent nrf-rs/microbit#123 to update that, but that in turn depends on nrf-rs/nrf-hal#431 to update nrf52833-hal.

[randomPoison]

Ah, that's good to know! I merged #1720 and #1721 thinking that the fact that CI passed meant it didn't break anything, but I'll roll those back to avoid breaking the embedded class in the meantime!

[qwandor]

I don't think those actually broke anything, because the examples weren't using anything from embedded-hal directly but rather depending on the re-export from the HAL crate.

[mgeisler]

Looks good to me, thanks! I really like how you're consistently linking to the crates you mention.