Support .tflite model files for Precise wakeword

After spending quite some time getting TF 2.2 wedged into my rpi4 I managed to work my way through the entire precise model trainer to build a complete model for my custom wake word. Unfortunately, I made it to the end to find the PR I’m using to make it all work only outputs .tflite via precise-convert.

It looks like .tflite is heading towards being the standard precise-convert output at some point. Any chance its straightforward for Rhasspy to support .pb and .tflite?

My apologies I couldn’t identify where in the Rhasspy code base that change would need to be made. It does not appear there is a way to deconstruct a .tflite file back into .pb.

(I’d also welcome suggestions others might have to workaround!)