🔧 Updated documentation for collect function regarding isolate groups (#533)

[Victowolf]

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🔧 Updated documentation for collect function regarding isolate groups (#533)

Pull Request Description

This PR updates the documentation for the collect function to provide better clarity on how it handles isolate groups. The changes aim to:

✅ Improve readability and maintainability of the documentation.
✅ Clearly explain the behavior of collect in scenarios involving isolate groups.
✅ Address issue #533 by enhancing the function’s inline comments and docstrings.

Changes Made:

📌 Updated lib/src/collect.dart with improved documentation.

Checklist:

• Documentation updated
• Code follows project guidelines
• Ready for review