Markdown: Support for nested parameters

[christophfroehlich]

I kindly submit another feature request for the markdown generation 😇

Currently, nested parameters are given with their leaf name, but without its parent(s).

One could simply change self.declare_parameters.code_gen_variable.name to self.declare_parameters.parameter_name, but maybe it can also be exported with this hierarchy to consider that in the jinja2 template?

generate_parameter_library/generate_parameter_library_py/generate_parameter_library_py/generate_markdown.py

Line 98 in a242eae

"name": self.declare_parameters.code_gen_variable.name,

Something like we have with the (manual) JTC docs would be great.

Is it even possible to add a description to a structure parent having no variable at this level?

My understanding of the python/jinja scripts is too low. But if someone points me in the direction I could help to implement these.