refactor(layouts): extract independent komorebi-layouts crate

This commit moves layout-related code into a new workspace crate
komorebi-layouts, with the intention of re-using it all in komorebi for
Mac instead of maintaining two separate implementations.

komorebi-layouts/src/lib.rs

@@ -0,0 +1,28 @@
+#![warn(clippy::all)]
+#![allow(clippy::missing_errors_doc, clippy::use_self, clippy::doc_markdown)]
+
+//! Layout system for the komorebi window manager.
+//!
+//! This crate provides the core layout algorithms and types for arranging windows
+//! in various configurations. It includes optional Windows-specific functionality
+//! behind the `win32` feature flag.
+
+pub mod arrangement;
+pub mod custom_layout;
+pub mod cycle_direction;
+pub mod default_layout;
+pub mod direction;
+pub mod layout;
+pub mod operation_direction;
+pub mod rect;
+pub mod sizing;
+
+pub use arrangement::*;
+pub use custom_layout::*;
+pub use cycle_direction::*;
+pub use default_layout::*;
+pub use direction::*;
+pub use layout::*;
+pub use operation_direction::*;
+pub use rect::*;
+pub use sizing::*;