Implement dynamic comparison system for Details page

[Kernix13]

Describe the solution you'd like:

The Details page should render two <pre> code blocks in a CSS grid:

• One for the user’s primary language
• One for the target language

The goal is to dynamically display syntax comparisons for conditionals, loops, methods, and data types.

This will require:

• A scalable data structure for storing code examples
• Dynamic rendering logic based on selected languages
• Adding examples for JS, Python, PHP, and C#

Subtasks will be tracked as separate issues

For example:

• Add PHP code examples for arrays/lists
• Add C# code examples for arrays/lists
• Add number type comparisons for all languages
• Add string method comparisons
• Add object/dictionary comparisons for all languages