Support PEP 484 type hints in generated docstrings

Support PEP 484 type hints in generated docstrings: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). Pyment builds docstrings from a function/method definition, but it currently ignores the type annotations written in the signature. If a function is defined with…