docs: prefer pnpm script shorthand in contributing guide

[pavan-sh]

Summary

This PR updates the contributing guide to use pnpm’s script shorthand for consistency and copy/paste friendliness:

• pnpm run lint → pnpm lint
• pnpm run format → pnpm format

These commands are equivalent, but the shorthand matches the rest of the repo’s script usage and reduces noise in documentation.

Test plan

• Verified the lint and format scripts exist in the root package.json.
• Ran Prettier formatting check on the edited file:

pnpm prettier --check .github/CONTRIBUTING.md

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

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📥 Commits

Reviewing files that changed from the base of the PR and between bf2e2fe and 204eedd.

📒 Files selected for processing (1)

• .github/CONTRIBUTING.md

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Walkthrough

The PR updates the CONTRIBUTING.md documentation file to standardize command invocations for npm scripts. Specifically, it replaces "pnpm run lint" with "pnpm lint" and "pnpm run format" with "pnpm format" in the documentation. These are documentation-only changes with no functional or behavioral modifications. No public APIs or exported declarations are altered. The change involves 2 lines added and 2 lines removed.

🚥 Pre-merge checks | ✅ 2

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and specifically summarizes the main change: updating documentation to use pnpm script shorthand in the contributing guide.
Description check	✅ Passed	The description is directly related to the changeset, providing clear context about why the changes were made, what was changed, and how it was tested.

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[RobinMalfait]

Let's keep it as is. No need to change this 👍

[pavan-sh]

Let's keep it as is. No need to change this 👍

No problem. Thanks for review and valuable time.