Develop NIP-X, NIP-Y, and NIP-Z Components

Description: Build the network interface protocols (NIPs) for Maker Buy, Taker, and Maker Sell operations. Tasks:

Implement NIP-X for Maker Buy orders.
Implement NIP-Y for Taker matching logic.
Implement NIP-Z for Maker Sell orders.
Write integration tests to simulate buy/sell order flow.