Initial backtesting engine

src/portfolio/mod.rs

@@ -0,0 +1,9 @@
+//! Portfolio simulation engine for RaptorBT.
+
+pub mod allocation;
+pub mod engine;
+pub mod position;
+
+pub use allocation::{AllocationStrategy, CapitalAllocator};
+pub use engine::PortfolioEngine;
+pub use position::PositionManager;