Add support for all read RPC endpoints associated with txn and block

[franciszekjob]

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sncast

Requested Feature

Add support for starknet_getBlock, starknet_getStateUpdate, starknet_getTransactionReceipt, etc.

[noa-starkware]

please add also starknet_getClassHashAt, starknet_getTransactionByHash, starknet_getNonce, selector, thanks!