Add documentation: Clarify the Usage of Custom Functions vs. Tools

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Migrating from Custom Functions to Tools

This document provides a comprehensive guide for migrating from the deprecated Custom Functions feature to the more powerful and flexible Tools feature. This migration is crucial for ensuring the continued functionality and future-proofing of your applications.

Why Migrate to Tools?

Custom Functions are now deprecated in favor of Tools. Tools offer several advantages:

• Enhanced Flexibility: Tools provide a more structured and versatile way to integrate external functionalities.
• Improved Maintainability: The Tools architecture promotes better code organization and easier maintenance.
• Future-Proofing: Tools are the recommended and actively developed approach for extending the capabilities of the platform.
• Better Integration: Tools are designed to integrate seamlessly with the platform's features, offering a more cohesive development experience.

Migration Path

The migration process involv

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