Overview: What does this pull request change?

Make the following changes:

• X_Array_Float -> FloatX (example: RGBA_Array_Float is renamed to FloatRGBA)
• X_Array_Int -> IntX (example: RGBA_Array_Int is renamed to IntRGBA)
• X_Tuple_Float = tuple[float, ...] -> FloatXLike = Union[FloatX, tuple[float, ...] (example: RGBA_Tuple_Float = tuple[float, float, float, float] was changed to FloatRGBALike = Union[FloatRGBA, tuple[float, float, float, float]]. This is for consistency with types such as Point3DLike, which are unions.)
• X_Tuple_Int = tuple[int, ...] -> IntXLike = Union[IntX, tuple[int, ...]

in order to add some color array types:

• FloatRGBA_Array is a NumPy array of shape (M, 4) containing M rows representing RGBA colors.
• FloatRGBALike_Array is anything which can be converted to a FloatRGBA_Array, including lists of colors, for example.
• FloatRGB_Array and FloatRGBLikeArray are the same, but for RGB colors.

and properly type multiple parameters, returned values and other variables which correspond to NumPy arrays of colors.

Motivation and Explanation: Why and how do your changes improve the library?

Many parameters, returned values and other variables around the source code were 2D NumPy arrays of multiple colors and their type hints were incorrect. Specifically, npt.NDArray[RGBA_Array_Float] is invalid, since RGBA_Array_Float is not really a valid or correct dtype in this case (it should be a float). This indicates that we need type aliases for arrays of colors.

However, the current names weren't ideal for this task, because, if we have RGBA_Array_Float for a single color, its corresponding type alias for array of colors would be RGBA_Array_Float_Array, which is a strange name: it's too long and contains the word Array twice, which is confusing. Therefore, I also needed to rename those aliases.

Links to added or changed documentation pages

There are too many type changes around the code, so listing all of them is not very practical. Instead, I'll just link the typing webpage:
https://manimce--4386.org.readthedocs.build/en/4386/reference/manim.typing.html

Reviewer Checklist

• The PR title is descriptive enough for the changelog, and the PR is labeled correctly
• If applicable: newly added non-private functions and classes have a docstring including a short summary and a PARAMETERS section
• If applicable: newly added functions and classes are tested