mnemonicToWalletKey() does not report mnemonics with typos

[talkol]

Consider these two snippets:

const mnemonic = "priority road check curious obvious ...";
const key = await mnemonicToWalletKey(mnemonic.split(" "));
const wallet = WalletContractV4.create({ publicKey: key.publicKey, workchain: 0 });

const mnemonic = "priority road check curious abvious ..."; // obvious has a typo = abvious
const key = await mnemonicToWalletKey(mnemonic.split(" "));
const wallet = WalletContractV4.create({ publicKey: key.publicKey, workchain: 0 });

They both pass smoothly and return different wallet addresses.

This is very dangerous. Consider that somebody has a mnemonic and the code that creates a wallet in software has a typo. He would end up reaching a different address by mistake. Send it funds. If this code is ever deleted and they try to recover the wallet from the written mnemonic, they will not make the same typo again, and the money will be lost.

Wanted behavior - Throw an error from mnemonicToWalletKey on any problem with the mnemonic (not enough words, too many words, words not in the dictionary, checksum of mnemonic doesn't add up).