Need code line high-light

[coanor]

Is your feature request related to a problem? Please describe.
For large code blocks, we need high-light effect on specific lines, these high light lines are better to explain and anwser the question.

Describe the solution you'd like
Like code line high-light in mkdocs material, the high-light syntax looks like this:

``` py hl_lines="2 3"
def bubble_sort(items):
    for i in range(len(items)):
        for j in range(len(items) - 1 - i):
            if items[j] > items[j + 1]:
                items[j], items[j + 1] = items[j + 1], items[j]
```

and we get the effect:

[Kota-Karthik]

@coanor I am interested in doing this issue
so kindly assign me this

[fenbox]

@Kota-Karthik Thank you. Looking forward to it.