Refactor: api-argument, rpc-argument, types-argument, and support multichains

[hackfisher]

Ref: https://polkadot.js.org/docs/api/FAQ/#since-upgrading-to-the-7x-series-typescript-augmentation-is-missing

To follow upstream structure and organize practice:

• split api-argument, rpc-argument, types-argument
• Support multi-chain, each chain should have their own metadata and definitions.

[hackfisher]

closed by #69 ?