Revert back to OpenAI Whisper instead of whisper.cpp ?

[mhubii]

• revert back to OpenAI whisper (works better for linux)

• keep action server structure

• fork this repo into ros2_whisper_cpp

• revert back changes

maybe check out rust https://github.com/huggingface/candle

[mhubii]

whisper.cpp release 1.5.0 https://github.com/ggerganov/whisper.cpp/releases/tag/v1.5.0 comes with full CUDA support, which should improve inference speed for this repository.

[mhubii]

closing this as whisper v1.5.0 is quite powerful indeed