Deploy Doxygen to generate code documentation

[rcasteran]

Is your feature request related to a problem? Please describe.
Source code is getting more and more complex as we introduced new feature.
Thus we need to be able to generate documentation from the source code of a given release.

Describe the solution you'd like

• Use Doxygen to generate documentation from the source code.
• Rework code comments to allow doxygen to parse them

Describe alternatives you've considered
No other alternatives considered

[rcasteran]

Code comment rules for Doxygen are described here in the project wiki