Implement `starknet.rs` support for block endpoints

[jelilat]

Implement autogenerated starknet.rs support for the following endpoints.

• starknet_getBlockWithTxHashes
• starknet_getBlockWithTxs
• starknet_blockNumber
• starknet_blockHashAndNumber
• starknet_getStateUpdate
• starknet_getStorageAt

Additional Context:

• https://github.com/NethermindEth/rpc-request-builder/issues/2
• https://github.com/NethermindEth/rpc-request-builder/blob/main/src/api/rpcspec/methods.ts

[Prabhat1308]

Hi . I will be working on this.