Make info.globals a map so it's easy to check info.globals.foo if foo is defined - removed all_ids, replaced by globals+stack

[ldemailly]

Fixes #299

[Copilot]

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object/state.go:91

• Double-check that reducing the slice size from e.depth+1 to e.depth correctly accounts for all expected stack frames. If the extra slot was used elsewhere, adjust accordingly.

allKeys := make([]Object, e.depth)

object/state.go:105

• [nitpick] Consider defining constants for the key names 'globals' and 'stack' to improve consistency and maintainability across the codebase.

info.Set(String{"globals"}, set) // 0 == globals