added package arlab_whisper - #234
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added the whisper package that implements issue [Feature] Speech controller: Speech to text node #55
the node can be started via a launch file and implements the following pipeline: check for a voice amplitude level -> detect a wakeword via a input buffer -> records a longer input sample -> uses a big whisper model to transcribe the input audio file -> send the transcript to a ros topic
the node can be stalled via a ros topic
the voice detection [Feature] Speech controller: Voice activity detection #50 is implemented in a very simple way
there is an config file to change whisper and detection parameters
there is a simple python script to check audio input quality