sane abi parsing

[zeroXbrock]

replaces the ad-hoc garbage parser with

• ABI function parser from alloy_json_abi
  • copy-paste function definitions from a smart contract into the config file to define our test calls
  • unlocks ABI parsing for all types (though fuzzing is still not supported for dynamic or nested types)
• ABI calldata encoder from foundry-common
  • very convenient, but could possibly be replaced with something simpler (is there something like this in alloy?)