//! Display driver for reovim.
//!
//! Linux equivalent: `drivers/video/`, `drivers/gpu/`
//!
//! Provides frame buffer management, layer compositing, and window management.
//!
//! # Components
//!
//! - Frame buffer (2D cell grid)
//! - Compositor (layer blending, z-order)
//! - Window manager (splits, tabs, layout)
//! - Terminal renderer (ANSI output)

// Placeholder - DisplayDriver trait and implementations will be added in Phase 3
