Support line numbers in code blocks

[ZothOmmog]

Description

Code blocks currently lack the ability to display line numbers.

Proposal

Add an optional feature to enable line numbering.

For example, something like this:

```javascript showLineNumbers
const foo = 'bar';
```.

[ZothOmmog]

already work with transform 4.55

https://github.com/diplodoc-platform/transform/releases/tag/v4.55.0

[d3m1d0v]

already work with transform 4.55

https://github.com/diplodoc-platform/transform/releases/tag/v4.55.0

Yeah, but WYSIWYG does not support line numbers. So I'm reopening this issue