Bar aggregation example

This example demonstrates how to use NautilusTrader's bar aggregation features to create higher timeframe bars from lower timeframe data.

The strategy shows how to:

• Load 1-minute bar data from a CSV file.
• Create 5-minute bars from 1-minute data using internal aggregation.
• Handle both timeframes independently in the same strategy.

This helps you understand how bar aggregation works in NautilusTrader and how to handle multiple timeframes in your strategies.