phroggie's 2.0 preview 3

Changes since preview 2:

• TTS effect now returns usage information:
  • $&ttsAudioDuration or $effectOutput[ttsAudioDuration]: a number with the duration of the audio, in seconds.
  • $&ttsBucket or $effectOutput[ttsBucket]: a string with the pricing bucket that was used, such as Wavenet or Studio.
  • $&ttsCost or $effectOutput[ttsCost]: a number exposing the quantity of bytes/chars expended.
  • $&ttsSucceeded or $effectOutput[ttsSucceeded]: a boolean indicating whether audio was sent/is sending to the speakers. false if a problem occured, true if you (likely) heard or are hearing something.
  • $&ttsVoiceName or $effectOutput[ttsVoiceName]: a string with the name of the voice used, such as en-US-Wavenet-C.
• Added a TTS Usage event to allow for tracking billing:
  • Including event filters and the following vars:
  • $googleTtsUsage[cost]: the number of chars/bytes expended.
  • $googleTtsUsage[tier]: the name of the pricing bucket.
• Better error handling.