doc: code quality guidelines

[SimardeepSingh1450]

Issue with current documentation:

There is a need for adding proper coding conventions so as to maintain code structure for easy readability , maintainability and maintaining the code quality. These guidelines can especially be helpful for newcomers to contribute to the project.

[UtkarshUmre]

please assign

[chandansgowda]

@UtkarshUmre Do you still want to work on this ?

[SimardeepSingh1450]

@chandansgowda , it's been a long time since this is open, I think I will take this up, assign it to me, I will raise a pr soon.