use forking for bot logic calling arb()

[rouzwelt]

atm all opp finding is based on calling arb() mthod on arb contract using rpc and see if it successful or not, this can put much stress on node, and is not the most efficient way.
a fork on certain blocknumber can ideally be used to lower the node stress on calls, as it would only tries fetching missing bits and not run teh whole trace everytime.
but this is not certain, and needs to be tested in prod to make sure if it can really help or not.
also for forking, using foundry_evm is needed since that has the logic to build blockchain state from rpc calls, and not just store calling args against result on disk like hardhat or anvil