Add example for Input and output Bindings

[rafamerlin]

Hi, I'm not very good with rust yet so I am happy to receive any feedback. I mostly copied the other example and made some small changes to make the bindings to work. Tested using ServiceBus and they work fine.

One thing to note is that I had to add a couple of properties missing in the client.rs file, that's the only change that could impact something else, it wasn't working before this changes though so hopefully this is an update to match the proto file.

This probably helps a bit with this request: https://github.com/dapr/rust-sdk/issues/48

[ghost]

All CLA requirements met.

[github-actions[bot]]

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