[FEATURE] CSS Style directional padding arguments

[noahprice-dev]

Is your feature request related to a problem?

It would be really nice to support multi-dimensional padding of the content within the final SVG. I've been working on a parallel exercise where I needed some extra definition of the padding around my output SVG box, as well as overall output size.

Describe the solution you'd like

CSS style declaration for padding would be like:

• 1 value: all sides
• 2 values: vertical | horizontal
• 3 values: top | horizontal | bottom
• 4 values: top | right | bottom | left"

Proposed API (if applicable)

# How would you like to use this feature?
from mdsvg import render

svg = render("# Hello", padding=[X]) # All sides same padding (existing behaviour)
svg = render("# Hello", padding=[X, Y]) # Top and bottom X, Left/Right Y
svg = render("# Hello", padding=[X, Y, Z]) # Top X, Left/Right Y, Bottom Z
svg = render("# Hello", padding=[X, Y, Z, W]) # Top X, Right Y,  Bottom Z, Left W

Describe alternatives you've considered

In theory you could just have named arguments (LeftPad, TopPad, etc.) but this API would feel at home for many users with Web experience.

Additional context

In my own project, I define all my padding at the start of my translate function (Similar behaviour to render())

# Snipped arguments for brevity - your "Style" arg handles what I've removed.
def md_to_svg(
    md_text: str,
   ...
    padding: int | list[int] = PADDING,
) -> str:
    # * Handle padding assignment.
    if isinstance(padding, int):
        _top_pad = padding
        _bottom_pad = padding
        _left_pad =  padding
        _right_pad = padding
    # ? CSS rules
    if isinstance(padding, list):
        match len(padding):
            case 1: 
                _top_pad = padding[0]
                _bottom_pad = padding[0]
                _left_pad =  padding[0]
                _right_pad = padding[0]
            case 2:
                _top_pad = padding[0]
                _bottom_pad = padding[0]
                _left_pad =  padding[1]
                _right_pad = padding[1]
            case 3:
                _top_pad = padding[0]
                _left_pad =  padding[1]
                _right_pad = padding[1]
                _bottom_pad = padding[2]
            case 4:
                _top_pad = padding[0]
                _left_pad =  padding[1]
                _right_pad = padding[2]
                _bottom_pad = padding[3]
            case _: _top_pad = padding

My use case is a CLI, so I am fine accepting a variable list.

Cheers!