Implement sidechain State Recovery Initialization Command execution

[mitsuaki-u]

Description

Add command to initialize state recovery.

let sidechainAccount be the deserialization of trs.params.sidechainChainAccount
if terminatedStateAccount(trs.params.chainID) exists:
    terminatedStateAccount(trs.params.chainID).stateRoot = sidechainAccount.lastCertificate.stateRoot
    terminatedStateAccount(trs.params.chainID).mainchainStateRoot = EMPTY_BYTES
    terminatedStateAccount(trs.params.chainID).initialized = True
else:
    createTerminatedStateAccount(trs.params.chainID, sidechainAccount.lastCertificate.stateRoot)

Acceptance Criteria

• Add unit tests for recovery initialization