create: TxDescriptor<
    {
        cap: bigint;
        end: number;
        first_period: number;
        index: number;
        last_period: number;
        verifier?: MultiSigner;
    },
>

Create a new crowdloaning campaign for a parachain slot with the given lease period range.

This applies a lock to your parachain configuration, ensuring that it cannot be changed by the parachain manager.