Add `HexNumber` and `BinaryNumber` class ala `DecimalNumber`

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## Description of proposed feature
I was looking to see if I could explain some CS concepts using Manim and wanted to be able to use Hex and Binary digits for animations. Also preferably I would like to have the option of including or dropping the `0x` or `0b` prefix. The use case that prompted me to search (and to find it can only be done with Decimal numbers) is to animate a rising counter of Hex digits [like the example of a custom animation in the docs](https://docs.manim.community/en/stable/tutorials/building_blocks.html#creating-a-custom-animation).

## How can the new feature be used?
Exactly the same as `DecimalNumber` except for Hex and Binary numbers respectively.

Start by locating the existing DecimalNumber implementation and its tests, then review the linked custom-animation documentation example. Add HexNumber and BinaryNumber with DecimalNumber-like behavior, including optional 0x and 0b prefixes, and verify that the classes support the rising-counter animation use case.

Written by the indexing model from the issue text.