chore: add allowScripts field to package.json

[Chaejy]

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What is the purpose of this pull request?

Add the allowScripts field to package.json for the npm install scripts policy, following the same approach as the PR for eslint/eslint.

What changes did you make? (Give an overview)

Starting with npm 12, install scripts that aren't covered by allowScripts are blocked by default. On a fresh install, three packages are blocked: yorkie and fsevents (×2, macOS-only).

This PR allows only yorkie, since it's the only one whose install script is actually required — it installs the git hooks, so when it's blocked the pre-commit hook is never created and lint-staged no longer runs on commit.

fsevents is intentionally left out: its install script isn't required, and the module still loads and works correctly without it.

I left the entry unpinned ("yorkie": true) since this repository commits package-lock.json, so the version is already locked. I'd be happy to pin it if reviewers prefer.

Related Issues

Is there anything you'd like reviewers to focus on?

Verified on npm 12.0.1 / Node.js v24.18.0 (rm -rf node_modules && npm install):

• Without allowScripts, yorkie is blocked and .git/hooks/pre-commit is missing.
• With "yorkie": true, yorkie runs and the hook is created.
• fsevents loads correctly even while its install script stays blocked.

I'd appreciate any feedback on whether fsevents should be handled explicitly, and on the unpinned-vs-pinned decision.

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• ✅ login: Chaejy / name: Jiyeon (0538fa0)

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[lumirlumir]

Thanks for opening this PR. This change makes sense to me, but I left one comment.

[lumirlumir]

LGTM, thanks!