Add Text-to-Speech (TTS) support

[birbilis]

would be nice to have Text-to-Speech (TTS) support

see
https://blog.grijjy.com/2017/01/09/cross-platform-text-to-speech
https://github.com/grijjy/JustAddCode/tree/master/TextToSpeech

[birbilis]

maybe should implement as a FireMonkey platform service

[birbilis]

could have either a TTS toggle button at TextStoryItem or have an AudioStoryItem do this by default for its TextStoryItem parent's Text when the AudioStoryItem has no audio of its own

so you would just drop an empty AudioStoryItem (should have such action like we have for empty ImageStoryItem on Edit toolbar) into a TextStoryItem and it would achieve same functionality as if that audio had been added as an .mp3

when dropped in ImageStoryItems it wouldn't do anything till via AudioStoryItemOptions popup some MP3 audio file is set to the AudioStoryItem child

[birbilis]

obviously support would depend on TTS languages available at target platforms (usually they have at least support for English TTS)