feat: wayland feature

Cargo.toml

@@ -31,7 +31,7 @@ send_wrapper = "0.6.0"
 prisma = "0.1.1"
 slog = "2.7.0"
 slog-stdlog = "4.1.1"
-xkbcommon = { version = "0.5.0", default-features = false }
+xkbcommon = { version = "0.5.0", default-features = false, optional = true }
 stardust-xr = "0.7.1"
 directories = "4.0.1"
 serde = { version = "1.0.145", features = ["derive"] }
@@ -46,3 +46,8 @@ git = "https://github.com/Smithay/smithay.git"
 default-features = false
 features = ["desktop", "renderer_gl", "wayland_frontend"]
 version = "*"
+optional = true
+
+[features]
+default = ["wayland"]
+wayland = ["dep:smithay", "dep:xkbcommon"]