docs: add AI agent integration entry points

[cursor]

Summary

• add repository-level documentation entry points for the AI agent integration workflow
• extend the architecture overview with the @onekeyfe/hardware-cli layer, usage flow, and operational constraints
• keep the change docs-only and link back to existing package and portal docs instead of creating a redundant new page

Docs added/updated

• README.md: added direct links to the architecture overview, CLI guide, and developer portal walkthrough
• docs/architecture.md: added an "AI Agent 集成架构" section covering intent, call flow, example commands, constraints, and related docs

Codepaths covered

• packages/hd-cli/README.md
• packages/hd-cli/skills/*/SKILL.md
• packages/hd-cli/package.json
• .claude-plugin/marketplace.json
• packages/connect-examples/developer-portal/content/en/hardware-sdk/agent-integration.mdx

Key knowledge gaps addressed

• the repository root did not provide a clear doc entry point for the recently added AI agent / CLI workflow
• docs/architecture.md did not explain where the CLI fits in the SDK stack or how agent-driven requests reach the device
• developer-facing constraints such as direct USB usage, physical confirmation, blocking device interaction, and firmware-update boundaries were not surfaced from the main in-repo docs

  

[revan-zhang]

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