Documentation: Improve language and add type hints for graph_scene module (#1076)

* Change coords_to_point and point_to_coords documentation to correctly match their functions

* Adjust docstring formatting to better match Numpy format

* Rewrite type descriptors in docs.

* Apply suggestions from code review

Co-authored-by: Benjamin Hackl <[email protected]>

* Rewrite coords_to_point() docstring

* Manually adjust to conform to black formatting

* Fix two more minor formatting issues

Co-authored-by: Benjamin Hackl <[email protected]>
Co-authored-by: Abel Aebker <[email protected]>

Author: aebkea