Sync slice/internal → main

[github-actions]

Automated PR – triggered by commit f0900f0

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PR-Codex overview

This PR enhances the README.md by adding a section on contributing, encouraging users to build new hooks for dynamic pricing and other features.

Detailed summary

• Added a new section titled Contribute in the README.md.
• Emphasized building new hooks for integration across all Slice stores and clients.

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