* contracts-bedrock: add permit functionality to mintable erc20

Adds `permit` functionality to `OptimismMintableERC20` tokens
that are deployed by the `OptimismMintableERC20Factory`.

* feat: max approve permit2 in ERC20Mintable

This commit max approves permit2 automatically for all holders of the
ERC20 bridge token. This enables all users on OP stack chains to skip an
approval step for actions on protocols utilizing permit2 e.g. Uniswap

* fix: constants first

* semver-lock: update

* snapshots: fix

* contracts: add natspec

* semver-lock: update

* contracts-bedrock: fix nits

* snapshots: update

---------
Co-authored-by: Mark Toda <toda.mark@gmail.com>