[ADD] all functioning, documentation started

fft/config/config.yaml

fft/fft/plotfourier.py

fft/launch/fft.launch.py

filter_signal/CMakeLists.txt

filter_signal/README.md

filter_signal/config/analyse.yaml

filter_signal/config/analytic_result.yaml

filter_signal/config/bandpass.yaml

filter_signal/config/bandstop.yaml

filter_signal/config/filter.yaml

filter_signal/config/highpass.yaml

filter_signal/config/lowpass.yaml

filter_signal/filter_config/float32.yaml

filter_signal/filter_config/imu.yaml

filter_signal/filter_signal/analyse.py

filter_signal/filter_signal/analyse_parameters.py

filter_signal/filter_signal/filter.py

filter_signal/filter_signal/filter_parameters.py

filter_signal/filter_signal/filters.py

filter_signal/filter_signal/utilities.py