Replace Lua integration contracts and docs with mruby Code Mode

[ruttydm]

Summary

Coordinated breaking mruby-only Code Mode migration for OpenCompany draft PR #8. Isolated from the application's uncommitted VFS/run-control work.

• Replace Lua core contracts with language-neutral ScriptBridge, collision-safe catalog mappings, exact aliases, typed pre-dispatch dispositions and Ruby documentation rendering.
• Migrate 600 repository-owned documentation pages (3,942 Ruby examples), review ambiguous operations against actual source schemas, and remove active Lua adapters/docs.
• Regenerate the public catalog: 591 integrations and 41,493 tools. No fabricated documentation fallback.
• Add self-contained public CI dependency setup, source-first contract tests, exhaustive catalog-map checks and real-engine compilation of documentation examples.
• Correct case-sensitive provider service/class references exposed by Linux qualification.
• Treat missing/custom/legacy action effects as writes and make successful write ledger entries non-retryable. Explicit read/write classifications are unchanged; 183 legacy action entries now receive conservative write handling.

Verified evidence

• Hosted CI 34243098751 is green at d8666a50966d51d8420d9908c5e7c1beca3dfdfd, the source pinned by the coordinated app and Docker workflows.
• 3,942 examples compile with the pinned mruby engine; zero failures. Compilation is not live provider execution.
• Contract export: 608 source packages, 41,995 tools, 224,442 published paths; no overwrites or missing mappings. Public counts exclude hidden/legacy aliases by design.
• Focused core/catalog suites pass. Provider metadata migration batches passed 1,013 tests / 11,913 assertions; overlapping reruns are not summed.
• No credentials or live provider/API calls were used for verification.

Coordination / remaining gates

The engine now has a separately qualified v0.1.0-rc.1 prerelease, including three-platform native archives, a minimal PHP adapter, checksums and provenance/SPDX attestations. Integration CI consumes that exact released PHP adapter and verifies the Linux AMD64 native archive before extraction. All 3,942 examples compile against the released artifacts; native source qualification remains in the engine repository.

Keep this PR draft while coordinated app release/cutover, parser-backed schema analysis, matched-model AX benchmarking, deeper native fuzz/security qualification and remaining dependency release coordination are outstanding. The app now enforces real catalog write classification, durable task-owned callback receipts and bounded host transports; that does not constitute a live deployment.

Existing QuickJS PRs are preserved, not merged or closed. Persisted user scripts are not translated or relabeled by this migration.