Add a CI to publish crates to crate.io

[JalonWong]

#93

[schteve]

I don't have crates.io access, I assume only niondir does. But it sounds like this would make it easier to get new versions published. I think regardless we need to start publishing new versions, the latest release is very very old.

[JalonWong]

@schteve Yes, I think so. Can you contact him to do the setting on crate.io? It's pretty easy.

[schteve]

@niondir

[JalonWong]

@niondir Can you please do the setting on crate.io? It's pretty simple, only three fields need to be filled in (owner, name, workflow filename).

https://crates.io/docs/trusted-publishing

[niondir]

should be active now

[JalonWong]

@niondir Thanks a lot! Did you set up https://crates.io/crates/freertos-cargo-build as well? We also need it.

[niondir]

Added as well

[JalonWong]

@niondir Thank you!
@schteve Can this PR be merged?

[schteve]

I'm good with it, just so I understand, after merging this I can create new releases by pushing a tag starting with 'v'? Like 'v0.2.0'.