feat: Solidity ABI encode functions and utils

[b-j-roberts]

Added various traits/utils for supporting Solidity-like ABI encode functions. This includes the traits :

• SolAbiEncodeTrait : providing equivalents for Solidity abi.encode and abi.encodePacked
• SolAbiEncodeSelectorTrait : for Solidity abi.encodeWithSelector
• SolAbiDecodeTrait : for Solidity abi.decode
• SolBytesTrait : Providing utilities for easy conversion of types into Solidity-like bytes1, bytes2, ..., bytes32 types

Also added some helpers for alexandria_bytes::Bytes, such as :

• Bytes <-> Cairo's ByteArray & bytes31 function options
• Debug & Display traits for Bytes, to allow printing Bytes as a hex string

Pull Request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Build-related changes
• Documentation content changes
• Other (please describe):

Issue Number: #274

Does this introduce a breaking change?

• Yes
• No