[DecviL]

The scene editor needs to use the same CLI scene services as its host without bundling another copy of the CLI implementation. This change publishes the shared browser runtime, supplies host-owned implementations through capabilities, and generates declaration-only inputs for the extension.

• Build and serve the shared scene core, EditorExtends, polyfills, loader, and import map through build-specific runtime URLs.
• Add cocos-cli/scene-editor/host and a browser host adapter with capabilities API 1, preserving the page SystemJS instance during service initialization.
• Generate self-contained scene editor declarations as part of CLI builds, and expose runtime enum values required by injected modules.
• Keep browser manifest API 1 and add capabilitiesApiVersion so existing protocol 2 consumers retain their loader contract. Protocol 3 consumers require the corresponding scene editor extension and PinK loader updates.

Validation:

• npm run compile passed, including browser runtime and declaration generation.
• Four targeted CLI test suites passed: 22 tests covering browser hosting, resource routes, module maps, and deferred module resolution.
• The matching scene editor extension built successfully; 58 suites / 687 unit tests and 28 VSIX delivery tests passed against this CLI.
• PinK client type checking and layer checks passed with the matching loader changes.

Full PinK UI interaction and native simulator regression tests were not run.