Desktop: Bundle for Mac and Windows (#3297)

* add bundle for mac os and windows

* Fix bundle name

This name gets used as the display name of the app on mac os, shorter name looks better and is more consistent.

* preserve std out by running bin directly

* bundle placeholder on linux

* fix linux

desktop/bundle/src/main.rs

@@ -0,0 +1,17 @@
+mod common;
+
+#[cfg(target_os = "linux")]
+mod linux;
+#[cfg(target_os = "macos")]
+mod mac;
+#[cfg(target_os = "windows")]
+mod win;
+
+fn main() {
+	#[cfg(target_os = "linux")]
+	linux::main().unwrap();
+	#[cfg(target_os = "macos")]
+	mac::main().unwrap();
+	#[cfg(target_os = "windows")]
+	win::main().unwrap();
+}