Implement ban functionality

- Added ban module
- Added Ban and Unban commands, supporting banning and unbanning players through various command parameters.
- Added timestamp formatting method in Utils utility class for displaying ban expiration times
- Introduced PlayerErrorCode enum defining various error codes including ErrBan
- Added dual ban checking for both IP and user during player login
- Optimized login failure responses to provide specific error reasons and parameters

src/main/java/emu/nebula/net/GameSession.java

@@ -24,6 +24,7 @@ public class GameSession {
     private String token;
     private Account account;
     private Player player;
+    private String ipAddress;
 
     // Crypto
     private int encryptMethod; // 0 = gcm, 1 = chacha20
@@ -143,6 +144,10 @@ public class GameSession {
         this.lastActiveTime = System.currentTimeMillis();
     }
 
+    public void updateIpAddress(String ip) {
+        this.ipAddress = ip;
+    }
+
     // Packet encoding helper functions
 
     @SneakyThrows