- Add class: 'EventPlayer'.

This update includes several changes aimed at improving memory management, configuration process. Notably, it migrates the Bank class usage to leverage  across various components, ensuring safer memory management and ownership semantics.

An adjustment in the  class is the modification of the  method parameter to accept a rvalue reference. This move aligns with modern C++ practices for resource management, enabling efficient transfer of ownership of card objects into a player's hand without unnecessary copying.

On the configuration front, the introduction of JSON parsing for setting up Drogon HTTP listeners and application configurations directly within the codebase provides greater flexibility.

Additionally, the codebase witnesses a broad application of  in drawing cards from the market, further exemplifying the adoption of modern C++ features to handle operations that may not always succeed. This use of  introduces clearer semantics for handling these cases.

Signed-off-by: AngTsusiong <angtsusiong@gmail.com>