feat(packaging): packaging de l'app via maven

chat/src/main/java/rtgre/ChatLauncher.java

@@ -0,0 +1,26 @@
+package rtgre;
+
+import rtgre.chat.ChatApplication;
+import rtgre.server.ChatServer;
+
+import java.io.IOException;
+
+public class ChatLauncher {
+    public static void main(String[] args) {
+        for (String arg : args) {
+            System.out.println(arg);
+        }
+        try {
+            if ("server".equals(args[0])) {
+                System.out.println("test1");
+                ChatServer.main(args);
+            } else {
+                ChatApplication.main(args);
+            }
+        } catch (Exception e) {
+            System.out.println("test2");
+            ChatApplication.main(args);
+        }
+
+    }
+}