Moved x11rb dep to unix cfg'd dependencies. Added init with todo!() to macos implementation

Cargo.toml

@@ -17,13 +17,12 @@ path = "src/examples/main.rs"
 crossbeam = "0.8.2"
 log = "0.4.19"
 raw-window-handle = "0.5.2"
-x11rb = "0.12.0"
 
 [target.'cfg(windows)'.dependencies]
 windows = {version = "0.48.0", features = ["Win32_UI_Accessibility", "Win32_Foundation", "Win32_UI_WindowsAndMessaging", "Win32_Graphics_Gdi", "Win32_System_Com", "Win32_System_Ole"]}
 
 [target.'cfg(unix)'.dependencies]
-
+x11rb = "0.12.0"
 
 
 [dev-dependencies]

src/macos/mod.rs

@@ -0,0 +1,6 @@
+pub fn init(
+    window_title: String,
+    tx: std::sync::mpsc::Sender<crate::UnderlayEvent>,
+) -> Result<(), String> {
+    todo!()
+}