Expose deterministic document and stream parsing controls

[Ismail-elkorchi]

Summary

• expose document scripting mode and deterministic step budgets across every parse entrypoint
• stream decoded chunks directly into one engine session and release mutable parsing state during public-tree conversion
• return exact named parse-error references and remove the never-populated diagnostic field
• reduce parser allocation overhead and correct retained-memory and CPU benchmark ownership
• strengthen strict TypeScript and type-aware ESLint checks

Validation

• complete release qualification
• 3,828 maintained WPT tree executions and 7,036 tokenizer outcomes
• Chromium, Firefox, and WebKit document, fragment, and serialization differentials
• Node, Deno, and Bun package/runtime checks
• 600-case fuzz, resource-limit, and 104/104 mutation qualification
• 12-round immediate and tagged-v0.1.1 performance qualification

All package manifests remain at 0.1.1.