Signatures: support lmsig logicsig signatures

[cce]

Based on algorand/py-algorand-sdk#579

[Copilot]

Pull Request Overview

This PR adds support for lmsig (logic signature multisignature) signatures, extending the existing multisignature functionality in the SDK. This appears to be a new signature format that differentiates multisig signatures on logic signatures from regular multisig signatures.

• Updates LogicSig class to support lmsig field alongside existing msig field
• Modifies signature verification logic to handle both legacy msig and new lmsig formats
• Updates test files to use the new lmsig format and adds comprehensive test coverage

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tests/resources/msig_delegated_other.txn	Test resource file with multisig delegated transaction using lmsig
tests/resources/msig_delegated.txn	Test resource file with multisig delegated transaction using lmsig
tests/8.LogicSig.ts	Updated test cases to support and verify lmsig functionality
src/signing.ts	Modified to check lmsig instead of legacy msig for address derivation
src/logicsig.ts	Core implementation adding lmsig support with separate signing and verification logic

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