arbitrageur and refactor

[Autoparallel]

• Added an Arbitrageur into strategies.rs complete with:
  • Functioning arbitrage math and single swap.
  • Loop to verify we get a valid portfolio swap.
• Reorganized the code to be a bit more clear.
  • Added config.rs
  • Used shared dependencies where I could to make each main.rs, strategies.rs, and startup.rs cleaner.
  • Added a SimulationContracts struct once I knew the final list of contracts we would need.
• Created a run() function to split off the loop for the simulation.

[0xJepsen]

Looks clean!

[0xJepsen]

This is clean, nice to see this happening in action