Add support for OpenAI Whisper

[joshuaboniface]

Adds basic support for OpenAI Whisper (local) as an STT provider.

This is supported by the upstream SpeechRecognition library, so this is just the standard translation to/from Kalliope.

Several options have been implemented and documented, including the ability to "unformat" the resulting strings if desired.

Also caps the Ansible version below 5 to fix test failures.

[Sispheor]

Tests are failling. I think we should block the max version of Ansible to 5 here and here

[joshuaboniface]

I did notice that about the tests but I wasn't too sure how to handle that: anything you want me to do in this PR?

[Sispheor]

Yes you can try the proposed changes.

[joshuaboniface]

Done, waiting on tests. I also accidentally added a commit for a second feature (FasterWhisper) which I force-pushed away, but that requires an upstream change to speech_recognition (Uberi/speech_recognition#693) before it can be added.

[joshuaboniface]

And looks like that solved it, I suppose we can just keep that commit in here, I've updated the description.

[Sispheor]

Thx. You can rebase your other PR so I can merge it

[jaggzh]

Is this keeping the whisper model loaded [or is it loaded each call]? Mine seems slow even with tiny being used.

[jaggzh]

Oh, this is great, btw! Thanks. :))

[joshuaboniface]

@jaggzh I believe that SpeechRecognition is loading it each time, which is indeed very slow. I ended up abandoning this myself, and using a custom integration with my own https://github.com/joshuaboniface/remote-faster-whisper tool.

[jaggzh]

Your flask secret looks a lot more developed than my flask server :) https://github.com/jaggzh/whisperpluck (This project was for someone to use a GUI for transcription though. Server to keep a whisper model loaded.)

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