feat(firestore): add support for regexFind and regexFindAll

[dlarocque]

Adds support for regexFind and regexFindAll expressions to Firestore Pipelines.

These new features were tested with trivial integration tests.

[changeset-bot]

🦋 Changeset detected

Latest commit: 8dbc932

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 3 packages

Name	Type
firebase	Minor
@firebase/firestore	Minor
@firebase/firestore-compat	Patch

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[gemini-code-assist]

Summary of Changes

Hello @dlarocque, 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 significantly enhances Firestore's data manipulation capabilities by introducing two new regular expression functions, regexFind and regexFindAll, to its pipeline expressions. These additions enable developers to precisely extract either the first occurrence or all occurrences of a pattern within string data, providing more powerful and flexible data processing directly within Firestore queries.

Highlights

• New Regex Functions: Added support for regexFind and regexFindAll Pipeline expressions in Firestore, allowing users to extract matching substrings from string fields or expressions.
• API and Documentation Updates: The new functions are exposed through the API, and comprehensive documentation has been added for both the Expression class methods and standalone functions, including usage examples.
• Testing: Integration and lite-API specific tests have been included to ensure the correct functionality of regexFind and regexFindAll.

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[github-actions]

Changeset File Check ✅

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[gemini-code-assist]

Code Review

This pull request adds support for regexFind and regexFindAll pipeline expressions to Firestore. The changes include updating the API surface, implementing the new expression types, adding documentation, and providing tests. The implementation looks solid, and the tests cover the new functionality. I've found a few minor issues in the documentation and JSDoc comments, including some typos and misleading examples, which I've commented on. Overall, this is a great addition.