Alexa support

[taeh98]

Hello,

I hope this finds you well.

Please could you add support for Alexa functionality? Alexa skills are implemented with AWS lambda functions, so doing this would enable Alexa functions to be written in Rust more easily.

The existing repo https://github.com/arienmalec/alexa_rust did this but it no longer works and appears not to be actively maintained; it is now incompatible with this library (upon which it relies). Incorporating its functionality directly into this library would fix compatibility issues and make it easier to write Alexa functions in Rust on the whole.

Thank you for your time and consideration.