Implement ImPlot widget in GUI application

[Pyanyaleri]

We need to have several plots for the data that we will need to process. This should include:

• Raw Audio data: To see what kind of audio are we parsing into the FFT. (This should include all the )
• Spectrogram: To see the frequency components of the audio in respect to time.
• Whistle Detector Output: Once the FFT outputs is parsed into the whistle NN, it should output the float value into a plot.

Optional (but nice to have graphs):

• Mono Audio stream: Since the current RoboÉireann codebase down-mixes the audio buffers from the microphones down to a mono stream and scales the data by a set gain, this output is nice to see the final audio data before being parsed into the FFT.