Refactor chat system: Introduce ChatRoom and ChatUser classes

- Created ChatRoom class to manage chat room functionalities, including user management, message handling, and game mechanics.
- Developed ChatUser class to represent individual users, handling user-specific actions and interactions within chat rooms.
- Implemented a Config class for loading configuration settings from a JSON file.
- Established a Server class to manage connections, handle requests, and facilitate communication between users and chat rooms.
- Introduced a Database class for database interactions, utilizing PostgreSQL for user and room data management.
- Added utility functions in the Base class for JSON handling and socket communication.
- Created Object classes for Room and User to encapsulate their properties and behaviors.
- Updated main function to initialize server and load chat rooms from configuration.

src/main.cpp

@@ -0,0 +1,14 @@
+
+#include "core/config.h"
+#include "core/server.h"
+#include "lib/database.h"
+
+// main function
+int main(int, char **) {
+    auto config = std::make_shared<Yc::Lib::Config>();
+    auto database = std::make_shared<Yc::Lib::Database>(config);
+    auto server = std::make_shared<Yc::Lib::Server>(config, database);
+    server->createRooms(config->group("rooms"));
+    server->run();
+    return 0;
+}