[NeMoClaw][Doc] CONTRIBUTING.md missing `npm link` step — developer setup path broken

[zNeill]

Description

Description

1. Issue summary

Developer setup path fails with command not found: nemoclaw because CONTRIBUTING.md
does not include the required npm link step after npm install.

2. Detailed description

Follow the developer setup guide in CONTRIBUTING.md to build and run NemoClaw from source.
After completing all documented steps (npm install, cd nemoclaw && npm install && npm run build),
running nemoclaw onboard fails with zsh: command not found: nemoclaw.

The missing step is npm link at the repo root, which registers the nemoclaw CLI binary globally.
End-user install path (curl | bash) is not affected — only the developer/contributor path.

Steps to reproduce:

1. git clone https://github.com/NVIDIA/NemoClaw.git && cd NemoClaw
2. Follow CONTRIBUTING.md setup steps exactly
3. Run: nemoclaw --help
4. Result: command not found

Fix:
Run npm link after npm install at repo root. This should be added to CONTRIBUTING.md.

Environment:

• NemoClaw: v0.1.0 (main branch, commit f3430c6)
• GitHub: https://github.com/NVIDIA/NemoClaw
• Node.js: v23.10.0, npm: 11.3.0
• macOS 26.1 (Apple M4)

Steps to reproduce

No steps provided.

---

[NVB# 5997637]

[WuKongAI-CMU]

Opened a docs fix for this in #1003.