docs: correct receipt_wrong_kid behavior, align test refs to v1.1.0, improve v1.1.0 changelog

[GsCommand]

Motivation

• The test-vector documentation incorrectly implied receipt_wrong_kid.json could still verify with an explicit public key, which conflicts with the manifest and tests.
• Several embedded examples still referenced 1.0.0, creating version-drift against the repo's canonical 1.1.0 line.
• The v1.1.0 changelog entry was terse and did not clearly communicate breaking vs non-breaking changes, removals, or scope limits.

Description

• Updated test_vectors/README.md so receipt_wrong_kid.json explicitly states it is expected to fail verification after a kid mutation changes the signed content.
• Replaced obsolete 1.0.0 example values with 1.1.0 in typescript-sdk/scripts/unit-tests.mjs to keep runtime examples coherent with the active Commons surface.
• Replaced the same 1.0.0 example values with 1.1.0 in python-sdk/tests/test_verify.py so the signed-receipt helper matches the repo's canonical version.
• Expanded and rewritten the v1.1.0 entry in CHANGELOG.md to describe what changed from 1.0.0, what was removed (including that Commons is no longer x402-first), breaking vs non-breaking changes, and known limitations/scope.

Testing

• Ran pytest -q python-sdk/tests/test_verify.py, which completed successfully.
• Attempted node typescript-sdk/scripts/unit-tests.mjs in this environment but it failed to start due to a missing local Node dependency (ethers), which is an environment setup issue and not caused by these edits.

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Codex Task