* contracts-bedrock: update Deployer's loadInitializedSlot

if contract is a proxy, it now gets the implementation address using either EIP1967Helper or AddressManager (for ResolvedDelegateProxy)

* contracts-bedrock: drop isProxy argument of loadInitializedSlot

* contracts-bedrock: improve logic in loadInitializedSlot

* contracts-bedrock: add tests in Initializable.t.sol for L1 implementations

* contracts-bedrock: update logic in Initializable.t.sol to count implementations in assertion

* forge install: solady

v0.0.158

* contracts-bedrock: add solady to foundry.toml remappings

* contracts-bedrock: drop vendor of solady sort

* contracts-bedrock: use solady LibString in loadInitializedSlot

* contracts-bedrock: define constants in EIP1967Helper and drop Constants import

this allows us to not have to update the version of Arithmetic, ResourceMetering, and Burn, which would otherwise clash with Deployer.sol

* contracts-bedrock: use interface for AddressManager instead of updating version directly

* contracts-bedrock: use native solidity concat in loadInitializedSlot

* op-bindings: make for MIP, PreimageOracle, and WETH9