feat: Implement core trading engine functionality with gRPC API

- Added Constants.cpp and Constants.hpp for price constants.
- Created README.md with project overview, features, requirements, and build instructions.
- Developed build.sh script for streamlined project building and management.
- Configured tests using Google Test framework in tests/CMakeLists.txt.
- Implemented unit tests for Order and Orderbook classes in test_order.cpp and test_orderbook.cpp.
- Added TradingEngineServer class with gRPC methods for order management in test_trading_engine_server.cpp.
- Defined trading protocol buffers in trading_optimized.proto for order requests and responses.

Author: rrsathe

.env

@@ -0,0 +1,24 @@
+# Trading Engine Development Configuration
+
+# Build Settings
+BUILD_TYPE=Release
+ENABLE_TESTING=ON
+ENABLE_SANITIZERS=OFF
+
+# Server Settings  
+SERVER_PORT=5001
+SERVER_ADDRESS=0.0.0.0
+
+# Performance Settings
+THREAD_COUNT=auto
+MAX_ORDERS=1000000
+PRICE_PRECISION=2
+
+# Logging Settings
+LOG_LEVEL=INFO
+LOG_FILE=trading_server.log
+ENABLE_CONSOLE_LOG=true
+
+# Development Settings
+ENABLE_DEBUG_INFO=false
+ENABLE_PROFILING=false