feat: Add MacOS support.

crates/pikl-gui/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "pikl-gui"
-description = "GUI frontend for pikl-menu (iced + Wayland layer-shell)."
+description = "GUI frontend for pikl-menu (iced-based, with platform-specific windowing)."
 version.workspace = true
 edition.workspace = true
 license.workspace = true
@@ -11,6 +11,8 @@ workspace = true
 [dependencies]
 pikl-core = { path = "../pikl-core" }
 iced = { version = "0.14", features = ["tokio"] }
-iced_layershell = "0.15"
 tokio = { version = "1", features = ["sync", "macros", "rt"] }
 tracing = "0.1"
+
+[target.'cfg(target_os = "linux")'.dependencies]
+iced_layershell = "0.15"