docs(object-methods): add comprehensive Object methods concept page with tests

- Cover Object.keys(), values(), entries(), fromEntries() for iteration - Explain shallow vs deep cloning (assign vs structuredClone) - Document hasOwn(), Object.is(), and Object.groupBy() (ES2024) - Include object inspection and protection methods - Add 40 Vitest tests covering all code examples

Leonardo Maldonado committed on Jan 6, 2026, 05:28 PM

Showing 2 changed files +1347 additions -0 deletions

A docs/beyond/concepts/object-methods.mdx +785

A tests/beyond/objects-properties/object-methods/object-methods.test.js +562