Add Trino cost profiling support and learned default parameters

[JunWang222]

This PR adds Trino cost profiling support, including:

• A Trino profiling pilot for running operator cost profiling locally
• Shared profiling documentation that explains how users can rerun profiling on their own machine
• Trino-specific setup notes and command examples
• Default Trino cost parameters for users who want to try Wayang with Trino

The default parameters are intended as starting values. For accurate optimization on a specific machine or deployment, users should follow the profiling guide and regenerate parameters locally.