docs(contributing): add npm link step to developer setup

[dknos]

Summary

• Adds missing npm link step to the developer setup section in CONTRIBUTING.md
• Required for the nemoclaw CLI to work locally during development

Test plan

• Follow the updated setup instructions from scratch
• Verify nemoclaw command is available after setup

Fixes #1429

🤖 Generated with Claude Code

Summary by CodeRabbit

• Documentation
  • Added local development testing section to contribution guidelines with instructions for building and verifying the CLI locally using package linking.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: 4719dc6f-bafd-4398-9900-63e4e1364ce0

📥 Commits

Reviewing files that changed from the base of the PR and between f38642e and 785f2b4.

📒 Files selected for processing (1)

• CONTRIBUTING.md

📝 Walkthrough

Walkthrough

A "Local Development Testing" section was added to CONTRIBUTING.md with instructions for using npm link to test the locally built nemoclaw CLI tool, including verification steps and the corresponding unlink command. This is a documentation-only change with no code modifications.

Changes

Cohort / File(s)	Summary
Documentation CONTRIBUTING.md	Added "Local Development Testing" section with npm link setup instructions for local CLI verification and cleanup steps.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 A whisker-twitch of joy, I say,
For docs that guide the testing way!
npm link now lights the dev's bright path,
No more confusion's aftermath! ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the main change: adding npm link documentation to the developer setup section of CONTRIBUTING.md.
Linked Issues check	✅ Passed	The PR fully implements the requirements from issue #1429 by adding the missing npm link step with local development testing instructions as suggested.
Out of Scope Changes check	✅ Passed	All changes are directly scoped to addressing issue #1429; only documentation additions to CONTRIBUTING.md with no unrelated modifications.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@CONTRIBUTING.md`:
- Around line 56-61: The docs risk instructing users to run npm link from the
wrong directory (e.g., still in ./nemoclaw) which can link the plugin instead of
the root CLI; update the CONTRIBUTING.md step before the npm link command to
make the working directory explicit by telling users to return to the repo root
(or run the appropriate cd) so npm link targets the CLI package, then run npm
link and verify with the nemoclaw --version check.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: 3b8f0111-0648-4d9b-a5b7-76d01e93c77c

📥 Commits

Reviewing files that changed from the base of the PR and between c99e3e8 and f38642e.

📒 Files selected for processing (1)

• CONTRIBUTING.md