nitdoc: Create nitdoc web version

Introduced a new module to generate the nitdoc in terms of the new MM
Creating a class which generate the overview page

Signed-off-by: Stefan Lage <lagestfan@gmail.com>
nitdoc: Added nav bar

Signed-off-by: Stefan Lage <lagestfan@gmail.com>
nitdoc: Adding function to generate a header

Create function to added a header in the body, we need it for the navbar

Signed-off-by: Stefan Lage <lagestfan@gmail.com>