Refactor ScriptManager

[VIPO777]

Scope

Refactor ScriptManager to use proper names aligned with Racket semantics, replace ad-hoc containers with shared ones, and rename the global pointer.

Inputs / References

• Racket data types: https://docs.racket-lang.org/reference/data.html
• Racket modules/namespace: https://docs.racket-lang.org/guide/modules.html
• Dc = Racket symbol; ScriptModule = Racket module.

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1) Structures — Explore & Normalize

Goal: Inventory and rename the main and related structures tied to ScriptManager, mapping to Racket terms. Keep offsets correct.

1.1 Identify Core Types

• Dc (Racket Symbol): m_name, m_hash (StringId64), m_index, m_flags.
• ScriptModule (Racket Module): name, resolved path, namespace, bindings, bytecode, exports, requires, state, flags.
• ScriptNamespace (Racket Namespace): top-level defs, imports, exports.
• ScriptValue (boxed value): opaque payload / tag.
• ScriptManager: symbol table, module maps (by name/path), namespaces, loaded-list, config flags, search root.

1.2 Naming Rules

• Use actual engine terms, only use placeholders for unknowns (m_field{:offset}).
• Align conceptual names to Racket (module/symbol/namespace/export/require), but do not override proven engine names.

1.3 Deliverables

• A Racket mapping table (engine term → Racket concept) to keep terminology consistent.

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2) Functions — Audit & Rename

Goal: Catalog ScriptManager public/major functions and standardize names/arguments to reflect Racket semantics.

2.2 Naming/Args Conventions

• Use argument names mirroring Racket.

2.3 Deliverables

• A function matrix (name, purpose, key args, return).
• Cross-references to the structures they read/write.

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3) Containers — Replace Ad-Hoc with Shared

Goal: Replace the legacy bucket with FixedSizeHashTable<>; use ListArray<>/StaticArray<> where appropriate.

3.1 Replace Legacy

• Remove the ad-hoc ModuleBucket (0x98) and migrate to: FixedSizeHashTable
• Lists of exports/requires: ListArray<Dc>.

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4) Global Pointer — Rename

Goal: Rename the global pointer to reflect its role.

• g_scriptGlobals → g_ScriptManager.
• it is not part of EngineComponents and is intentionally a global singleton pointer.
• Update all references; (ABI/exports)

4.1 Deliverables

• Rename diff summary (symbols touched, external visibility impact).

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