feat: add CliCommand block with syntax highlighting and multi-example docs

[huacnlee]

Summary

• New markdown-it plugin (cli-command.ts) renders <CliCommand> tags as styled code blocks with proper shiki dual-theme color variables (--shiki-light / --shiki-dark) for syntax highlighting: longbridge binary (purple), subcommands (blue), args and inline comments (gray)
• Header changed from compact bar to h2-style title matching SDK Links section; Install CLI link floats right with no border, pointing to /docs/cli
• Single-line <CliCommand>content</CliCommand> tokens (parsed as paragraph > inline by markdown-it) now correctly handled via Case 2 token splice
• Expanded all non-trade <CliCommand> blocks from single-line to multi-line format with 2–4 real verified examples per command and locale-aware comments (en / zh-CN / zh-HK) across quote pull, content, subscribe, security, and watchlist docs

Test plan

• Run bun run dev and verify CliCommand blocks render with correct syntax highlighting in light and dark mode
• Verify h2 title "CLI" appears with Install CLI link on the right (no border)
• Verify Install CLI link points to /docs/cli
• Check a few pages across en / zh-CN / zh-HK locales

🤖 Generated with Claude Code

[github-actions]

🚫 [AutoCorrect Lint] <AutoCorrect> _{reported by reviewdog 🐶}

Suggested change

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