docs: shorten quick-start install command to npm i -g

[kaghni]

Shortens the quick-start install command in the README from npm install -g to npm i -g.

The npm install in the Development section is left unchanged, since it installs local dependencies rather than the global CLI.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Documentation
  • Updated Quick Start installation command to use the shorthand npm i -g instead of the full npm install -g.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

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Review profile: CHILL

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Run ID: 654e96cf-0e27-4e68-80ab-39fa543780cd

📥 Commits

Reviewing files that changed from the base of the PR and between 4388400 and 22002af.

📒 Files selected for processing (1)

• README.md

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📝 Walkthrough

Walkthrough

The README's Quick start installation command was updated to use the npm shorthand npm i -g instead of the full npm install -g form, reducing verbosity while maintaining identical functionality and the downstream hivemind install step.

Changes

README Installation Command Update

Layer / File(s)	Summary
Quick start command shorthand README.md	The Quick start one-liner installation command was condensed from npm install -g to the equivalent npm i -g shorthand.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~1 minute

Poem

🐰 With npm's shorthand, we hop with glee,
From install to i, much shorter to see!
The hivemind's quick start now swiftly runs,
A tiny tweak done, the CLI sets sun! 🌙

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Description check	❓ Inconclusive	The description clearly explains what was changed and why, but does not follow the required template structure with Summary, Version Bump, and Test plan sections.	Add the required sections from the template: Summary (already mostly provided), Version Bump details, and Test plan checklist to ensure clarity on version bumping and testing status.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and specifically describes the main change: shortening the quick-start install command from 'npm install -g' to 'npm i -g', which matches the actual modification in README.md.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

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• Create PR with unit tests

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