Change visibility of type hints

[AdamRJensen]

There are the following options for displaying type hints in the conf.py file:

autodoc_typehints = "none"          # hide all type hints
# or
autodoc_typehints = "description"   # move type hints into parameter descriptions
# or
autodoc_typehints = "signature"     # show in function signature (default-ish behavior)
# or
autodoc_typehints = "both"          # show in both signature and description