feat(gui): Add Wayland GUI frontend to menu system.

crates/pikl-gui/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "pikl-gui"
+description = "GUI frontend for pikl-menu (iced + Wayland layer-shell)."
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+
+[lints]
+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"