docs: add hardware CLI usage guide

[cursor]

Summary

• add a repository-local README for @onekeyfe/hardware-cli
• link the new CLI guide from the root README.md and docs/architecture.md
• document verified CLI runtime behavior, common workflows, and troubleshooting notes

Docs updated

• packages/hd-cli/README.md
• README.md
• docs/architecture.md

Codepaths covered

• packages/hd-cli/src/cli.ts
• packages/hd-cli/src/sdk.ts
• packages/hd-cli/src/session.ts
• packages/hd-cli/src/chains.ts
• packages/hd-cli/src/pinentry.ts
• packages/hd-cli/src/storage/*

Knowledge gaps addressed

• where onekey-hw fits in the monorepo and when to use it
• how the CLI handles Node USB transport, stdout/stderr output, and interactive prompts
• how hidden-wallet session caching works on macOS and Linux
• common constraints such as firmware-update stubs, non-TTY passphrase fallback, and Linux secret-tool requirements

  

[revan-zhang]

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