fix(seismic-web3): resolve overloaded ABI functions

[Kewe63]

Fixes #295

Summary

• resolve overloaded Python contract functions from their supplied positional arguments
• perform overload checks against remapped ABI inputs while preserving the original Seismic signature for selector construction
• carry the selected overload through smart routing and output decoding
• reject encoding-ambiguous overloads with MismatchedABI and support canonical-signature disambiguation
• document overload resolution and the signature-qualified escape hatch

Testing

• make ci — 295 passed; Ruff format/lint and ty check passed
• uv run --isolated --python 3.10 pytest tests/test_abi.py tests/test_public_contract.py -q — 43 passed
• uv run --isolated --python 3.11 pytest tests/test_abi.py tests/test_public_contract.py -q — 43 passed
• uv run --isolated --python 3.12 pytest tests/test_abi.py tests/test_public_contract.py -q — 43 passed

The public regression fails on the pre-fix implementation with EncodingTypeError before provider dispatch. No live node or integration test was needed for this local ABI-resolution path; repository CI will run the node-backed integration jobs.