feat: Add unit tests for firestore feature initialization

[joehan]

Description

From Jules:

Adds unit tests for the functions in src/init/features/firestore. This includes tests for:

• askQuestions and actuate in index.ts
• initRules and getDefaultRules in rules.ts
• initIndexes in indexes.ts

[gemini-code-assist]

Summary of Changes

Hello @joehan, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces comprehensive unit tests for the Firestore feature initialization logic. The tests cover the core functions responsible for asking user questions, actuating file writes, and initializing Firestore rules and indexes, ensuring the robustness and correctness of the setup process.

Highlights

• Core Initialization Logic Tested: New unit tests have been added for "askQuestions" and "actuate" functions within src/init/features/firestore/index.ts, verifying user interaction and file writing behavior.
• Firestore Rules Initialization Tested: Unit tests for "initRules" and "getDefaultRules" in src/init/features/firestore/rules.ts ensure the correct generation and handling of Firestore security rules.
• Firestore Indexes Initialization Tested: The "initIndexes" function in src/init/features/firestore/indexes.ts now has dedicated unit tests, covering the process of prompting for and writing Firestore index configurations.

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[gemini-code-assist]

Code Review

This pull request adds unit tests for the Firestore feature initialization, which is a great addition for improving code quality and stability. The tests are generally well-structured. I've identified a non-deterministic test that relies on the current system time, which could lead to flaky test runs. I've provided a suggestion to make it deterministic. Additionally, I've included a couple of minor suggestions to improve test clarity and remove unused code.