Add Hanami web framework topic

[andrew]

Please confirm this pull request meets the following requirements:

• I followed the contributing guidelines: https://github.com/github/explore/blob/main/CONTRIBUTING.md.
• This change is not self-promotion.

Which change are you proposing?

• Suggesting edits to an existing topic or collection
• Curating a new topic or collection
• Something that does not neatly fit into the binary options above

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Curating a new topic or collection

• I've formatted my changes as a new folder directory, named for the topic or collection as it appears in the URL on GitHub (e.g. https://github.com/topics/[NAME] or https://github.com/collections/[NAME])
• My folder contains a *.png image (if applicable) and index.md
• All required fields in my index.md conform to the Style Guide and API docs: https://github.com/github/explore/tree/main/docs

Hanami is a well-established Ruby web framework with significant community adoption and active development. It offers an alternative to Rails with its modular architecture and clean design principles.

[Copilot]

Pull Request Overview

This PR adds a new topic for the Hanami Ruby web framework to the GitHub explore repository. The addition introduces Hanami as an alternative to Rails, highlighting its modular architecture and clean design principles.

• Creates a new topic entry for the Hanami web framework
• Includes metadata with framework details, related technologies, and official links
• Provides a description emphasizing Hanami's focus on simplicity and modular design

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_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[ahpook]

Nice addition, thank you!