Implement character showcase

src/main/java/emu/nebula/server/handlers/HandlerPlayerCharsShowReq.java

@@ -0,0 +1,24 @@
+package emu.nebula.server.handlers;
+
+import emu.nebula.net.NetHandler;
+import emu.nebula.net.NetMsgId;
+import emu.nebula.proto.PlayerCharsShow.PlayerCharsShowReq;
+import emu.nebula.net.HandlerId;
+import emu.nebula.net.GameSession;
+
+@HandlerId(NetMsgId.player_chars_show_req)
+public class HandlerPlayerCharsShowReq extends NetHandler {
+
+    @Override
+    public byte[] handle(GameSession session, byte[] message) throws Exception {
+        // Parse req
+        var req = PlayerCharsShowReq.parseFrom(message);
+        
+        // Set
+        boolean success = session.getPlayer().setShowChars(req.getCharIds());
+        
+        // Encode and send
+        return session.encodeMsg(success ? NetMsgId.player_chars_show_succeed_ack : NetMsgId.player_chars_show_failed_ack);
+    }
+
+}