add_signature_parameters : intelligently support parameters that can not be first or last

[smarie]

We could introduce two new arguments first_possible and last_possible, that would intelligently position the provided parameters according to their kind/default value.

For example

• if there is a **kwargs, parameters from the last_possible would place themselves before it.
• If there are parameters without default value, parameters from the first_possible that have a default value would place themselves after them