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11940ddb04
Add an opaque Object type for the key→value storage backing Value::Object. It exposes a small set of methods (get, insert, remove, iter, iter_sorted, cursor, serde) and keeps the backing store private, so future representations -- inline small-map, hash-backed, lazy, arena, FFI-callback -- can plug in without touching the call sites that name this type. Nothing in the engine uses Object yet. Value::Object still wraps Rc<BTreeMap<Value, Value>>; the payload swap and call-site migration come in the next PR. Object stands on its own unit tests in the meantime. docs/value/object.md walks through the design, the precedents it follows (serde_json::Map, toml::Table, simdjson DOM), and the concrete workloads the abstraction is meant to unlock. A matching Set abstraction follows in a separate PR. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
