[app-wiring-refactor]: Apply review comments:

- Add reference to original library in `FluentBuilder`.
- Change `I<Name>` notation to `<Name>Impl` notation.
- Move error config to test resources
- Add comment with config instruction
- Add config to the documentation

Mage.Server/src/main/java/mage/server/managers/ChatManager.java

@@ -0,0 +1,36 @@
+package mage.server.managers;
+
+import mage.game.Game;
+import mage.server.ChatSession;
+import mage.server.DisconnectReason;
+import mage.server.exceptions.UserNotFoundException;
+import mage.view.ChatMessage;
+
+import java.util.List;
+import java.util.UUID;
+
+public interface ChatManager {
+    UUID createChatSession(String info);
+
+    void joinChat(UUID chatId, UUID userId);
+
+    void clearUserMessageStorage();
+
+    void leaveChat(UUID chatId, UUID userId);
+
+    void destroyChatSession(UUID chatId);
+
+    void broadcast(UUID chatId, String userName, String message, ChatMessage.MessageColor color, boolean withTime, Game game, ChatMessage.MessageType messageType, ChatMessage.SoundToPlay soundToPlay);
+
+    void broadcast(UUID userId, String message, ChatMessage.MessageColor color) throws UserNotFoundException;
+
+    void sendReconnectMessage(UUID userId);
+
+    void sendLostConnectionMessage(UUID userId, DisconnectReason reason);
+
+    void sendMessageToUserChats(UUID userId, String message);
+
+    void removeUser(UUID userId, DisconnectReason reason);
+
+    List<ChatSession> getChatSessions();
+}