[xiayip]

Adds reBot Arm HMI to the reBot Arm B601-RS → Community Contributions table in the English and Simplified Chinese READMEs.

The Zephyr RTOS handheld terminal provides CAN joint monitoring, encoder-based local control, damping/impedance modes, hand-guided trajectory recording and replay, persistent Flash storage, and ROS 2 controller-switch requests. Both entries include the project repository, author, and a hardware demo on Bilibili.

Validation: git diff --check passes; the repository and Bilibili video links were checked. Documentation only; no firmware or hardware changes.

[Copilot]

🟢 Approval recommended

Both documentation entries are consistent with the described project, with no unresolved findings.

No open issues 🎉

What changed in this PR

Adds reBot Arm HMI to the B601-RS community contributions in both READMEs.

Changes:

• Summarizes the handheld terminal’s capabilities in English and Simplified Chinese.
• Links the project repository, author, and hardware demo.

File	Description
README.md	Adds the English community contribution entry.
README_zh.md	Adds the matching Simplified Chinese entry.

_{Review effort: Balanced}