feat(foundry): 100% migration from dapptools

[sambacha]

prereqs

Foundry - foundry.toml is configured to use the existing structure for tests/etc
Justfile - this replaces Makefile, dotenv and bash scripts for test running/etc

updated

ds-test/test.sol git submodule was removed (redundant as their is a copy in test/dapp_test/lib/ds-test)

note you may have to manually update your .git/modules dir

usage

run the just command and you see recipes

$ just
just --list
Available recipes:
    build                     # Build Output
    build-mainnet             # [TEST] mainnet test
    forge-gas-snapshot        # [GAS] get gas snapshot timer
    forge-gas-snapshot-diff
    gas-snapshot              # [GAS] default gas snapshot script
    gas-snapshot-local        # [GAS] get gas snapshot from local tests and save it to file
    size                      # Contract Size
    test                      # [TEST] default test scripts
    test-debug *commands=""   # [TEST] run mainnet fork forge debug tests (all files with the extension .t.sol)
    test-local *commands=""   # [TEST] run local forge test using --match-path <PATTERN>
    test-mainnet *commands="" # [TEST] run mainnet fork forge tests (all files with the extension .t.sol)