refactor: adds error response object (#1619)

* add error response object

* export error response properly

* type mockRippled

* fix linter

* fix ts

* fix comments

test/integration/integration.ts

@@ -7,6 +7,7 @@ import { Client, Wallet } from 'xrpl-local'
 import { AccountSet, SignerListSet } from 'xrpl-local/models/transactions'
 import { convertStringToHex } from 'xrpl-local/utils'
 import { sign, multisign } from 'xrpl-local/wallet/signer'
+
 import { Transaction } from '../../src/models/transactions'
 
 import serverUrl from './serverUrl'