Add support for uint512

[tabaktoni]

Is your feature request related to a problem? Please describe.
Add support for uint512 the same way we support uint256
https://docs.starknet.io/documentation/architecture_and_concepts/Smart_Contracts/serialization_of_Cairo_types/#serialization_in_u512_values

Describe the solution you'd like

• Create singular class CairoUint512
  https://github.com/starknet-io/starknet.js/blob/feat/wallet-rpc/src/utils/cairoDataTypes/uint256.ts#L39

• Implement request and response parsers using it

[PhilippeR26]

@ivpavici
I can handle this one.

[PhilippeR26]

@tabaktoni
For those used to using cairo.uint256() (like me), I plan to create also a cairo.uint512()

[tabaktoni]

Sure, great!