feat(firestore): migrate and refactor samples from nodejs-firestore

[angelcaamal]

Description

Fixes #b/489841801

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Checklist

• I have followed guidelines from CONTRIBUTING.MD and Samples Style Guide
• Tests pass: npm test (see Testing)
• Lint pass: npm run lint (see Style)
• Required CI tests pass (see CI testing)
• These samples need a new API enabled in testing projects to pass (let us know which ones)
• These samples need a new/updated env vars in testing projects set to pass (let us know which ones)
• This pull request is from a branch created directly off of GoogleCloudPlatform/nodejs-docs-samples. Not a fork.
• This sample adds a new sample directory, and I updated the CODEOWNERS file with the codeowners for this sample
• This sample adds a new sample directory, and I created GitHub Actions workflow for this sample
• This sample adds a new Product API, and I updated the Blunderbuss issue/PR auto-assigner with the codeowners for this sample
• Please merge this PR for me once it is approved

Note: Any check with (dev), (experimental), or (legacy) can be ignored and should not block your PR from merging (see CI testing).

[snippet-bot]

Here is the summary of changes.

You are about to add 6 region tags.

• firestore/limit-to-last-query.js:17, tag firestore_limit_to_last_query
• firestore/pipelines-quickstart.js:17, tag firestore_pipelines_quickstart
• firestore/quickstart.js:17, tag firestore_quickstart
• firestore/solution-counters.js:19, tag firestore_solution_sharded_counter_increment
• firestore/solution-counters.js:27, tag firestore_solution_sharded_counter_get
• firestore/solution-counters.js:37, tag firestore_data_delete_doc

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[gemini-code-assist]

Summary of Changes

Hello, 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 consolidates and enhances the Node.js Firestore samples by moving them into a dedicated directory. It also expands the sample collection with new examples for advanced querying and data processing pipelines, alongside updated quickstart and distributed counter examples. This restructuring aims to improve organization, maintainability, and discoverability of the Firestore Node.js documentation samples.

Highlights

• Sample Migration: Migrated existing Node.js Firestore samples into a newly created, dedicated firestore/ directory for better organization.
• New Sample Additions: Introduced new samples demonstrating advanced Firestore features, specifically limitToLast queries and data processing pipelines.
• Dependency Management and Documentation: Established a new package.json file for managing dependencies and a README.md for comprehensive documentation, tailored specifically for the Firestore samples.

Changelog

• firestore/README.md
  • Added a comprehensive README file for the Firestore Node.js samples, including a table of contents, usage instructions, and testing guidelines.
• firestore/limit-to-last-query.js
  • Added a new sample demonstrating how to use the limitToLast query feature in Firestore.
• firestore/package.json
  • Added a new package.json file to manage dependencies and scripts specifically for the Firestore samples.
• firestore/pipelines-quickstart.js
  • Added a new quickstart sample showcasing the use of Firestore pipelines for data querying and transformation.
• firestore/quickstart.js
  • Added a quickstart sample demonstrating basic CRUD operations (create, read, update, delete) with Firestore documents.
• firestore/solution-counters.js
  • Added a sample illustrating how to implement distributed counters using Firestore.
• firestore/test/limit-to-last-query.test.js
  • Added unit tests to verify the functionality of the limitToLast query sample.
• firestore/test/quickstart.test.js
  • Added unit tests to ensure the quickstart sample performs its operations correctly.
• firestore/test/solution-counters.test.js
  • Added unit tests to validate the distributed counter sample's behavior.

Activity

• No human activity (comments, reviews, etc.) has been recorded on this pull request yet.

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[gemini-code-assist]

Code Review

This pull request migrates several Firestore Node.js samples. The changes are generally good, and I've identified a few areas for improvement. There's an inconsistency in the new README.md regarding a sample file name, which could confuse users. I've suggested corrections for this in both the table of contents and the relevant section. Additionally, I've pointed out a confusing use of the .select() method in the solution-counters.js sample and suggested a clearer alternative.