Revise dynamic programming considerations and pitfalls

[djeada]

No description provided.

[Copilot]

Pull Request Overview

This PR revises the dynamic programming considerations and pitfalls section by restructuring the content with more specific explanations and concrete examples. The changes aim to make the content more practical and actionable for readers learning dynamic programming concepts.

• Rewrites the "Identifying DP Problems" section with specific scenarios and examples
• Enhances state design explanations with concrete examples like knapsack problem
• Improves common pitfalls section with detailed explanations of consequences

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