Added
- [`MArrayElement`](https://github.com/drageelr/manim-data-structures/blob/1854335f2311c3157f19e6d328165013fc64cbf6/src/manim_data_structures/array.py#L6) class to represent an array element.
- [`MArray`](https://github.com/drageelr/manim-data-structures/blob/1854335f2311c3157f19e6d328165013fc64cbf6/src/manim_data_structures/array.py#L243) class to represent an array.