Translate the run-sessions guide into Simplified Chinese

[heimanba]

Add docs/guides/run-sessions.zh-CN.md as a faithful Simplified Chinese translation of the canonical English guide.

Acceptance criteria

• Preserve commands, option names, resource names, and links exactly where they are technical identifiers.
• Use the project vocabulary from CONTEXT.md for agent, session, deployment, config, state, and remote.
• Add the translated guide to the Chinese documentation links where appropriate.
• bun test scripts/open-source.test.ts passes, including the local Markdown link check.

No product-code changes are expected.