Add Firestore rules for handshakes collection

[Yuvraj-Sarathe]

Added rules for a new collection to manage cross-device pairing via handshakes, allowing specific read and write permissions.

Summary by Sourcery

New Features:

• Introduce Firestore rules for the handshakes collection to support secure cross-device pairing operations.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: fafa9afd-6f43-4c1a-b5c1-d56a5fb73b97

📥 Commits

Reviewing files that changed from the base of the PR and between d814256 and 9b22fcd.

📒 Files selected for processing (1)

• firestore.rules

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch 1-12-character-manual-code-does-not-login-directly

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Visit the preview URL for this PR (updated for commit 9b22fcd):

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