viem support for overlord

This library contains functions and types to extend the @mountainpath9/overlord-core library for use with viem.

In addition to rexporting all from @mountainpath9/overlord-core the following functions are provided:

function getPublicClient(ctx: TaskContext | TaskRunner, chain: Chain): Promise<PublicClient>
function getWalletClient(ctx: TaskContext, chain: Chain, walletName: string): Promise<WalletClient>
function getMevProtectedPublicClient(ctx: TaskContext, chain: Chain): Promise<PublicClient>
function getMevProtectedWalletClient(ctx: TaskContext, chain: Chain, walletName: string): Promise<WalletClient>
function createTransactionManager(ctx: TaskContext, client: WalletClient, params: TxSubmissionParams, opts?: VtmOptions)

The TransactionManager submits transactions to the blockchain, with controls to subsequently increase the gas tip, and ultimately cancel the transaction if unsuccessful:

export interface TransactionManager {
  /**
   * Sign and submit the given transaction and wait
   * for it to be mined. This interface combines these
   * operations so that an implementation can lock the current
   * nonce until the transaction has been successfully mined.
   *
   * If the transaction fails to be mined, this will throw an
   * exception.
   */
  submitAndWait(tx: ContractTransaction): Promise<TransactionReceipt>;
}