Hello! So I was thinking about launching a crypto meme coin soon, and was therefore wondering how to make a multisignature wallet and how do they work? Its essentially just that two different wallets have to sign transactions for the wallet to withdraw etc? Where do i create this wallet, and how would the process be at the other wallets? Will the phantom transaction just appear out of nowhere for the linked "validator-wallets"? And where would I make such wallet for solana?