Function render 

pub fn render(explorer: &mut FileExplorer, frame: &mut Frame<'_>, area: Rect)

Render the file explorer into area using the default colour theme.

This is the simplest rendering entry-point. Call it from your application’s Terminal::draw closure, passing a mutable reference to the explorer state and the current Ratatui Frame.

The widget renders three vertical zones:

• Header — current directory path inside a rounded border.
• List — scrollable, highlighted list of directory entries.
• Footer — key hints (left) and status / filter info (right).

Example

terminal.draw(|frame| {
    render(&mut explorer, frame, frame.area());
}).unwrap();