Feat: WIP terse code documentation

crates/ratatui/src/scroll_indicators.rs

@@ -1,13 +1,17 @@
+//! Up/down arrow scroll indicators for bounded lists.
+
 use ratatui::layout::Rect;
 use ratatui::style::{Color, Style};
 use ratatui::widgets::Paragraph;
 use ratatui::Frame;
 
+/// Horizontal alignment for scroll indicators.
 pub enum IndicatorAlign {
     Center,
     Right,
 }
 
+/// Render up/down scroll arrows when content overflows.
 pub fn render_scroll_indicators(
     frame: &mut Frame,
     area: Rect,