feat(sdk-coin-iota): transaction builder for iota

[parasgarg-bitgo]

• Implements transaction builder infrastructure for IOTA coin with transfer, validation, and broadcasting capabilities

TICKET: WIN-6890

[Copilot]

Pull Request Overview

This PR implements the transaction builder infrastructure for the IOTA coin, enabling transfer transactions with validation, signing, and broadcasting capabilities.

Key Changes:

• Added transaction builder classes (TransactionBuilder, TransferBuilder, TransactionBuilderFactory)
• Implemented Transaction and TransferTransaction classes with full serialization support
• Enhanced utility functions for validation of raw transactions, signatures, and other IOTA-specific data

Reviewed Changes

Copilot reviewed 19 out of 19 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
modules/sdk-coin-iota/test/unit/utils.ts	Expanded test coverage for utility validation functions
modules/sdk-coin-iota/test/unit/transferTransaction.ts	Added comprehensive tests for transfer transaction operations
modules/sdk-coin-iota/test/unit/transactionBuilder/transferBuilder.ts	Added tests for transfer builder functionality and validation
modules/sdk-coin-iota/test/unit/transactionBuilder/transactionBuilderFactory.ts	Added tests for transaction builder factory
modules/sdk-coin-iota/test/unit/transactionBuilder/transactionBuilder.ts	Added tests for base transaction builder
modules/sdk-coin-iota/test/unit/keyPair.ts	Enhanced keypair tests with address derivation
modules/sdk-coin-iota/test/unit/iota.ts	Added extensive transaction method tests
modules/sdk-coin-iota/test/resources/iota.ts	Added test data for transactions
modules/sdk-coin-iota/src/lib/utils.ts	Added raw transaction and signature validation
modules/sdk-coin-iota/src/lib/transferTransaction.ts	Implemented transfer transaction class
modules/sdk-coin-iota/src/lib/transferBuilder.ts	Implemented transfer transaction builder
modules/sdk-coin-iota/src/lib/transactionBuilderFactory.ts	Implemented factory for creating transaction builders
modules/sdk-coin-iota/src/lib/transactionBuilder.ts	Implemented base transaction builder
modules/sdk-coin-iota/src/lib/transaction.ts	Implemented base transaction class
modules/sdk-coin-iota/src/lib/index.ts	Added exports for new transaction classes
modules/sdk-coin-iota/src/lib/iface.ts	Added transaction interfaces and types
modules/sdk-coin-iota/src/lib/constants.ts	Added transaction-related constants
modules/sdk-coin-iota/src/iota.ts	Implemented transaction methods in main coin class
modules/sdk-coin-iota/package.json	Added lodash and blake2b dependencies

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[hitansh-madan]

Need to validate limits for edge cases, but changes generally look fine