Create prototype for line segment calculation to test linking processing to utils

Processing/processing.cpp

     cvtColor(inputPicture, inputPicture, COLOR_BGR2GRAY);
     threshold(inputPicture, inputPicture, thresholdValue, 255, THRESH_BINARY);
     return inputPicture;
-}
+}
+
+std::vector<LFRLine> Processing::calculate_line_segments(const Mat& inputPicture)
+{
+    return std::vector<LFRLine>();
+}

Processing/processing.h

 #include <iostream>
 #include <opencv2/opencv.hpp>
+#include <utils.h>
 
 using namespace cv;
 
     ~Processing();
 
     Mat calculate_binaray(Mat& inputPicture, int thresholdValue);
+
+    std::vector<LFRLine> calculate_line_segments(const Mat& inputPicture);
 };