Clean-up, type-hints and documentation for three_dimensions.py (#3109)

* Clean-up, type-hints and documentation for three_dimensions.py

* Added length definition for Line3D.

* Update three_dimensions.py

* Add TYPE_CHECKING and replacing Colors with Color

replacing the Colors Enum with Color because both will soon be deprecated but Color can be tracked down easier

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Fixed return for perpendicular line in Line3D.

Co-authored-by: Tristan Schulz <[email protected]>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: 3 people