Fix address parsing and display errors

[alisinabh]

Fixes parsing of address and displaying it using human_arg/2 function in Utils.

[Copilot]

Pull Request Overview

This PR fixes address parsing and display by improving the human_arg/2 function to properly handle binary addresses and enforce EIP-55 checksum formatting. The key issue was that binary addresses starting with bytes 0x30 and 0x78 (representing the string "0x") were incorrectly parsed as hex strings.

Key Changes:

• Updated human_arg/2 to use pattern matching for exact binary size validation and apply checksumming to all addresses
• Modified prepare_arg/2 and to_checksum_address/2 to use stricter pattern matching for hex address strings
• Updated all test fixtures to use checksummed addresses for consistency

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
lib/ethers/utils.ex	Core fix: improved binary pattern matching for addresses and added checksumming logic to human_arg/2
test/ethers/utils_test.exs	Added regression tests for binary address handling and checksumming behavior
test/ethers/types_contract_test.exs	Updated address fixture to use checksummed format
test/ethers/registry_contract_test.exs	Updated address fixture to use checksummed format
test/ethers/owner_contract_test.exs	Updated address fixture to use checksummed format
test/ethers/event_mixed_index_contract_test.exs	Updated address fixtures in test assertions to match new checksummed output
CHANGELOG.md	Documented breaking change and bug fix for address handling

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