docs: remove App Deployment product surface

[Yevanchen]

Summary

• remove the App Deployment guides, navigation entries, CLI examples, product-model claims, and screenshot in English, Simplified Chinese, and Japanese
• remove feature-derived Cloudflare domains, bindings, secrets, and permission guidance while preserving the Mosoo self-host deployment guide
• sync OpenAPI provenance to Mosoo main at dd0bf6e08c80450587a328a74d820171fb71b4cb; the normalized public API snapshot is unchanged

Verification

• npm run openapi:check
• npm run lint
• npm run types:check
• npm run test:seo (36 passed)
• npm run build (352 static pages)
• git diff --check
• tracked-source residue scan for App Deployment, apps.mosoo.ai, .mosoo.toml, Production Activity, and bound-capability terms (0 matches)

Part of langgenius/mosoo#580.