add: cm page

Signed-off-by: Kingtous <kingtous@qq.com>

src/core_main.rs

@@ -1,3 +1,7 @@
+use hbb_common::log;
+
+use crate::start_os_service;
+
 /// Main entry of the RustDesk Core.
 /// Return true if the app should continue running with UI(possibly Flutter), false if the app should exit.
 pub fn core_main() -> bool {
@@ -5,7 +9,13 @@ pub fn core_main() -> bool {
     // TODO: implement core_main()
     if args.len() > 1 {
         if args[1] == "--cm" {
-            // For test purpose only, this should stop any new window from popping up when a new connection is established.
+            // call connection manager to establish connections
+            // meanwhile, return true to call flutter window to show control panel
+            return true;
+        }
+        if args[1] == "--service" {
+            log::info!("start --service");
+            start_os_service();
             return false;
         }
     }