Add new Whisper and Say with voice-commands

[akafred]

"Say with voice" and "Whisper with voice"-commands would enable me to issue voice outputs to Alexa in my language (the Amazon Polly Liv-voice reads like a Norwegian).

The commands could be something like 'Say "text" using "voice"' and 'Whisper "text" using "voice"', where the voice option could be in a dropdown.

Not sure if there is a way to detect the supported voices, but I found a list of standard voices I think are supported.

I believe the implementation of this is relatively straightforward by wrapping the output text in SSML-tags and changing a couple of parameters in the API call.

https://developer.amazon.com/en-US/docs/alexa/custom-skills/request-and-response-json-reference.html#outputspeech-object

https://developer.amazon.com/en-US/docs/alexa/custom-skills/speech-synthesis-markup-language-ssml-reference.html#voice

https://docs.aws.amazon.com/polly/latest/dg/standard-voices.html