Add pre-commit hooks with husky and lint-staged

[robertocarlous]

Summary

There are no pre-commit hooks, so unformatted or lint-failing code can be committed. This creates noisy diffs and lets type errors slip into PRs.

Proposed Setup

// package.json additions
"lint-staged": {
  "src/**/*.ts": ["eslint --fix", "prettier --write"],
  "tests/**/*.ts": ["eslint --fix", "prettier --write"]
}

• Install husky and lint-staged
• husky install wired to prepare npm script
• Pre-commit hook runs lint-staged
• Pre-push hook runs npm run test -- --passWithNoTests

Acceptance Criteria

• npm install sets up hooks automatically via prepare script
• Committing a file with a lint error is blocked
• Committing a file with wrong formatting auto-fixes and re-stages
• CI still runs full lint + tests independently of hooks

[GreatShinro]

@GreatShinro has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi, can I work on this please?

ℹ️ Repo Maintainers: To accept this application, review their application or assign @GreatShinro to this issue.

[drips-wave]

Congratulations, @GreatShinro! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

🧑‍💻 @GreatShinro: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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