koh-gt

Change deserializer from DeserializerSegWit to DeserializerLitecoin due to Ferrite MWEB softfork at height 150,000 after update. ``` Jul 13 05:15:47 ubuntu-virtual-machine electrumx_server[42601]: raise ChainError(f'UTXO {hash_to_hex_str(tx_hash)} / {tx_idx:,d} not ' Jul...

Adds JSON configuration file for Ferrite (FEC) with the corresponding Scrypt algorithm and peer magic values for mainnet and testnet. 20230721