Port to C++ : Playing with Image arrays

[meshtag]

Is your feature request related to a problem? Please describe.
Current implementation for working with image arrays is in Python, as discussed in this thread, we need to port it to C++.

Describe the solution you'd like

• Make use of cv::Mat's inbuilt slicing functionalities for demonstration purpose(s).
• Add an implementation using for loops as well, this is done for the purpose of making students aware of pointer manipulation and its arithmetic in C++.
• Add a makefile to compile and build related executable(s).
• Maintain a .md file for theoretical part (and depicting expected results) as well.