pdptool - use the correct params name for create-proof-set command

[longfeiWan9]

Checklist

• This is not a question or a support request. If you have any Curio related questions, please ask in the discussion forum.
• This is not a new feature request. If it is, please file a feature request instead.
• I have searched on the issue tracker and the discussion forum, and there is no existing related issue or discussion.
• I am running the Latest release, or the most recent RC(release candidate) for the upcoming release or the dev branch(master), or have an issue updating to any of these.

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Improvement Suggestion

When I use pdptool to create a proofset, the command line suggests that I must provide --recordkeeper which is not mentioned anywhere in the pdp repo. So I guess it must be the smart contract address for either PDP Verifier or PDP service.

To avoid confusion, I suggest we change the recordKeeper to pdp-service-contract for a better user experience. For example:

NAME:
   pdptool create-proof-set - Create a new proof set on the PDP service

USAGE:
   pdptool create-proof-set [command options]

OPTIONS:
   --service-url value   URL of the PDP service
   --pdp-service-contract value  Address of the pdp service contract
   --service-name value  Service Name to include in the JWT token
   --extra-data value    Optional ABI-encoded extra data as a hex string to pass to the listener contract (max 2048 bytes)
   --help, -h            show help