Function render_markdown 

pub fn render_markdown(text: &str, wrap_width: u16) -> Vec<Line<'static>>

Parse text as Markdown and return ratatui Lines for display.

Supported elements (minimum viable set):

• Bold **text** → bold style
• Italic *text* → italic style
• Inline code `code` → Color::Cyan
• Fenced code blocks ``` → each line prefixed with │ in cyan
• Unordered lists - item / * item → prefixed with •
• Ordered lists 1. item → prefixed with N.
• Horizontal rules --- → a line of ─ chars filling wrap_width
• Plain paragraphs → rendered as-is

Falls back to a single raw line per \n if parsing produces no output (e.g. an empty string or whitespace-only input).