feat: add AI solution complexity comparison

[jainiksha]

Description

Adds an AI Solution Complexity Comparison feature that helps candidates
understand how different approaches behave as input size increases.

Features

• Time complexity comparison
• Space complexity comparison
• Input-size scaling analysis
• Approximate operation growth
• Bottleneck identification
• Practical performance impact
• Complexity comparison table
• Space/time trade-off analysis
• Interactive input-size selection
• Interview explanation framework
• AI optimization guidance

[github-actions]

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📥 Commits

Reviewing files that changed from the base of the PR and between 9fb2c2a and 9262d23.

📒 Files selected for processing (1)

• frontend/src/pages/AIInterviewQuestionSolutionComplexityComparison.jsx

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