Add DSTestPlus (support approximate equal)

Revert "Update IHvm.sol"

Update IHvm.sol

Update README.md

Update README.md

mics update

add types and typechain folder to prettierignore

Update README.md

Update .gitmodules

move dapptool test related files to src/test

update readme

update hardhat config

init dapp

dapp install ds-test

dapp init SolidityTemplate