Feat: WIP terse code documentation

crates/ratatui/src/modal.rs

@@ -1,9 +1,12 @@
+//! Centered modal frame with border and title.
+
 use crate::theme;
 use ratatui::layout::Rect;
 use ratatui::style::{Color, Style};
 use ratatui::widgets::{Block, Borders, Clear, Paragraph};
 use ratatui::Frame;
 
+/// Centered modal overlay with titled border.
 pub struct ModalFrame<'a> {
     title: &'a str,
     width: u16,