jiangchang-platform-kit

Shared platform components for Jiangchang skills:

• sdk/jiangchang_skill_core: entitlement SDK package.
• python-runtime/: shared third-party dependencies (pyproject.toml + uv.lock) for all skills; keep in sync with the desktop app resources/jiangchang-python-runtime/.
• .github/workflows/reusable-release-skill.yaml: reusable CI release workflow.
• examples/workflows/use-reusable-release-skill.yaml: caller workflow sample.