feat: claim cmd for cli

Some more sophisticated users may want access to simple tools for programmatic claiming of funds (eg. if have multiple wallets or want to cron it).

This PR introduces a claim command on the cli.

/// Claims all available funds for a given address
    #[command(arg_required_else_help = true)]
    Claim {
        /// Path to the wallet mnemonic
        #[arg(short = 'S', long)]
        secret: PathBuf,
        /// RPC Url
        #[arg(short = 'U', long)]
        rpc_url: String,
        /// Path to the wallet mnemonic
        #[arg(short = 'F', long)]
        factory_addr: String,
        // Address to claim for
        #[arg(short = 'A', long)]
        addr_to_claim: String,
        // Num of retries when attempting to make a transaction.
        #[arg(long, default_value = "10")]
        retries: usize,
    },

It is used as such:

saturn-contracts claim  -S ./secrets/.secret -U $RPC_URL -F $FACTORY_ADDRESS -A $CLAIM_ADDRESS --retries=10

[x] claim command for cli
[x] update readme

filecoin-saturn / contracts

feat: claim cmd for cli #17