Add getBoth method for record destructuring

[tech-andgar]

Add a new method that returns a record with success and error values for destructuring.
Include documentation and tests for the new functionality.

Summary by Sourcery

Introduce a getBoth method to Result that returns a record containing both success and error values for easy destructuring using Dart 3 record patterns

New Features:

• Add getBoth method on Result to return a Dart 3 record with optional success and error fields

Documentation:

• Document getBoth usage in README with example code for record destructuring

Tests:

• Add tests verifying getBoth returns correct record for Success and Failure cases

[sourcery-ai]

Reviewer's Guide

This PR introduces a new getBoth method on the ResultDart hierarchy to return a Dart 3 record for easy destructuring of success and error values, and adds corresponding documentation and unit tests.

File-Level Changes

Change	Details	Files
Add getBoth API to ResultDart interface and its implementations	Declared ({S? success, F? error}) getBoth() in the sealed base class with doc comments Implemented getBoth in Success to return (success, null) Implemented getBoth in Failure to return (null, error)	lib/src/result_dart_base.dart
Document getBoth usage in README	Added a new section showing example of destructuring record with getBoth Explained return values and null handling in the README	README.md
Add unit tests for getBoth behavior	Created a test group for getBoth Added test case for success returning non-null success and null error Added test case for failure returning null success and non-null error	test/src/result_dart_base_test.dart

---

Tips and commands

Interacting with Sourcery

• Trigger a new review: Comment @sourcery-ai review on the pull request.
• Continue discussions: Reply directly to Sourcery's review comments.
• Generate a GitHub issue from a review comment: Ask Sourcery to create an
  issue from a review comment by replying to it. You can also reply to a
  review comment with @sourcery-ai issue to create an issue from it.
• Generate a pull request title: Write @sourcery-ai anywhere in the pull
  request title to generate a title at any time. You can also comment
  @sourcery-ai title on the pull request to (re-)generate the title at any time.
• Generate a pull request summary: Write @sourcery-ai summary anywhere in
  the pull request body to generate a PR summary at any time exactly where you
  want it. You can also comment @sourcery-ai summary on the pull request to
  (re-)generate the summary at any time.
• Generate reviewer's guide: Comment @sourcery-ai guide on the pull
  request to (re-)generate the reviewer's guide at any time.
• Resolve all Sourcery comments: Comment @sourcery-ai resolve on the
  pull request to resolve all Sourcery comments. Useful if you've already
  addressed all the comments and don't want to see them anymore.
• Dismiss all Sourcery reviews: Comment @sourcery-ai dismiss on the pull
  request to dismiss all existing Sourcery reviews. Especially useful if you
  want to start fresh with a new review - don't forget to comment
  @sourcery-ai review to trigger a new review!

Customizing Your Experience

Access your dashboard to:

• Enable or disable review features such as the Sourcery-generated pull request
  summary, the reviewer's guide, and others.
• Change the review language.
• Add, remove or edit custom review instructions.
• Adjust other review settings.

Getting Help

• Contact our support team for questions or feedback.
• Visit our documentation for detailed guides and information.
• Keep in touch with the Sourcery team by following us on X/Twitter, LinkedIn or GitHub.

[sourcery-ai]

Hey there - I've reviewed your changes and they look great!

---

Sourcery is free for open source - if you like our reviews please consider sharing them ✨

• X
• Mastodon
• LinkedIn
• Facebook

_{Help me be more useful! Please click 👍 or 👎 on each comment and I'll use the feedback to improve your reviews.}

[tech-andgar]

@sourcery-ai title