test(matchers): honor SkipCompare in address matcher

[huklaa]

Summary

• Make the custom "addressEqual" matcher honor the declared "SkipCompare" sentinel.
• Add regression coverage confirming that address comparison is skipped when requested.

Root cause

The TypeScript declaration accepts "SkipCompare" as an argument to "addressEqual", but the runtime implementation passes the sentinel to "isAddressable()" before checking "isSkipCompare(other)".

This causes a valid, compiling assertion to fail because the sentinel object is rejected as an invalid address or account.

Changes

• Return early from "addressEqual" when the expected value is "SkipCompare".
• Add focused regression coverage for "addressEqual(skipCompare)".
• Preserve normal address, account-object, negation, and invalid-input behavior.

Testing

• Matcher suite: 16 passing
• Focused reproducer: passed
• ESLint: passed
• Prettier: passed
• "git diff --check": passed

Scope

This is separate from #399 and #400, which concern the "hexEqual" matcher.

Closes: #407

[github-actions]

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[github-actions]

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