Add TTS support

[aparatext]

The API wrapper is already implemented, but Qt has no default way to play the received WAV file from JSON. Is there a way to do it in C++?

[herobrine7gamer]

@walking-octopus you could try to save the wav somewhere and then play it after that , but this might need apparmor permissions , so it is better to play it directly . how does the json file provide the wav exactly ?

[aparatext]

As far as I know, the array has to be converted to binary data and saved, which requires C++. At that point, it's easier to write a tiny plugin for playing it directly.

An example:

curl https://lingva.ml/api/v1/audio/auto/hi