Terminaltexteffects

* Major re-organization of the codebase and significant documentation changes and additions.

* Fixed Argfield nargs type from str to str | int.
* Implemented custom formatter into argsdataclass.py argument parsing.

* Fixed division by zero error in geometry.find_coord_at_distance() when the origin coord and the target coord are the same.
* Fixed gradient generating an extra color in the spectrum when the initial color pair was repeated. Ex: Gradient('ffffff','000000','ffffff','000000, steps=5) would result in the third color 'ffffff' being added to the spectrum when it was already present as the end of the generation from '000000'->'ffffff'.

* Fixed rare division by zero error in Path.step() when the final segment has a distance of zero and the distance to travel exceeds
the total distance of the Path.
* Fixed effects not respecting --no-color argument.

* Fixed looping animations when synced to Path not resetting properly.

* blackhole radius is based on the canvas size, not the input text size.