Sign Windows executable release artefacts

[SergioGasquez]

As @georgik requested, we could sign Windows executables the same way we do it for espup.

It would be really cool if we had a signing mechanism in esp-rs, as doing it in idf-env repo is not the best solution (its a completely unrelated repo and it requires some manual steps)

[jessebraham]

I think that essentially everybody installs via cargo install anyway, I've never heard anybody mention this issue before, so not sure what impact it will have in reality. But I suppose as long as it doesn't complicate the release process too much we can do it.

[jessebraham]

I'm just going to go ahead and say this isn't worth pursuing at this time. We can revisit it in the future if it becomes a necessity.