Add support for color visualization in inline code blocks

[Felix-CodingClimber]

Supported color models
Call out colors within a sentence by using backticks. A supported color model within backticks will display a visualization of the color.

The background color is #ffffff for light mode and #000000 for dark mode.
Screenshot of rendered GitHub Markdown showing how HEX values within backticks create small circles of color. #ffffff shows a white circle, and #000000 shows a black circle.

Here are the currently supported color models.

Color Syntax Example Output
HEX #RRGGBB #0969DA Screenshot of rendered GitHub Markdown showing how HEX value #0969DA appears with a blue circle.
RGB rgb(R,G,B) rgb(9, 105, 218) Screenshot of rendered GitHub Markdown showing how RGB value 9, 105, 218 appears with a blue circle.
HSL hsl(H,S,L) hsl(212, 92%, 45%) Screenshot of rendered GitHub Markdown showing how HSL value 212, 92%, 45% appears with a blue circle.
Note

A supported color model cannot have any leading or trailing spaces within the backticks.