feat(abstract-eth): add zama token consolidation support

[MohammedRyaan786]

TICKET: CHALO-606

This pull request adds support for building, validating, encoding, and decoding a new transaction type: flushing ERC-7984 tokens from a V4 forwarder contract to its parent wallet. The changes introduce new builder methods, validation logic, and ABI encoding/decoding utilities to handle this flow, ensuring correct transaction construction and classification.

ERC-7984 Forwarder Flush Transaction Support:

• Added new interface FlushERC7984ForwarderTokenData in iface.ts to represent the data required for ERC-7984 forwarder flush transactions.
• Introduced builder methods and private fields in TransactionBuilder for handling ERC-7984 forwarder flush parameters (tokenContractAddress, encryptedHandle, parentAddress), including validation logic and a transaction builder method. [1] [2] [3] [4] [5] [6]
• Updated transaction deserialization and validation logic to support the new transaction type, ensuring correct extraction and checking of all required fields. [1] [2]

ABI Encoding/Decoding Enhancements:

• Added functions in zamaUtils.ts to encode and decode the flush transaction calldata, including wrapping/unwrapping the callFromParent and confidentialTransfer calls. [1] [2]
• Updated imports and utility logic to support the new encoding/decoding flows, including new constants for method selectors and parameter types. [1] [2] [3]

Transaction Classification Improvements:

• Enhanced transaction type classification logic to detect the new ERC-7984 forwarder flush transaction by inspecting nested calldata.

Decoding Utilities:

• Added a function to decode flush transaction calldata into its component fields for use in deserialization and validation.

These changes collectively enable robust support for ERC-7984 forwarder flush transactions in the Abstract-ETH module, with proper encoding, decoding, validation, and transaction building.

[linear-code]

CHALO-606