add cli interface instructions

src/Ex6/README.md

@@ -16,3 +16,8 @@ Run Client.java
 ## Launch Server + Client
 
 Run App.java
+
+# CLI interface
+
+To play a move, enter the number of the cell you want to change.
+To exit, type "stop" or "close".

src/Ex6/network/packets/EndGamePacket.java

@@ -2,7 +2,7 @@ package Ex6.network.packets;
 
 import java.io.Serializable;
 
-import Ex6.Jeu.EtatCase;
+import Ex6.main.Jeu.EtatCase;
 import Ex6.network.Packet;
 import Ex6.network.PacketVisitor;