Linked JS executor to challenges

[Ishuuu1213]

No description provided.

[greptile-apps]

Greptile Summary

This PR integrates the existing JavaScript executor functionality directly into the challenges workflow by adding "Run in JS Executor" buttons to all four challenge cards on the challenges page. The JavaScript executor (javascript-executor.html) is a comprehensive multi-language code execution environment that supports 75+ programming languages via the Judge0 API, providing users with real-time code testing capabilities.

The implementation adds consistent secondary buttons alongside the existing "Solve Challenge" buttons, creating two distinct user paths: structured problem-solving through the main editor versus quick experimentation and prototyping in the JS executor. This change enhances the user experience by reducing friction - users can now immediately test algorithms or prototype solutions without navigating away from the challenges overview.

The relative path ../javascript-executor.html correctly points from the pages/ subdirectory to the root-level executor file, maintaining proper navigation structure. The buttons include appropriate aria-label attributes for accessibility compliance.

Additionally, the leaderboard was automatically regenerated during the deployment process, showing "No contributors yet" instead of the previous 36 contributor entries. This appears to be a side effect of the automated generate-leaderboard.js script running as part of the CI/CD pipeline rather than an intentional reset.

Confidence score: 4/5

• This PR is quite safe to merge with minimal risk of breaking functionality
• The main changes are straightforward HTML additions with proper relative paths, though the leaderboard reset needs investigation
• The LEADERBOARD.md file needs attention to understand why the automated script cleared the contributor data

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[Ishuuu1213]

@adityai0 Please review it
It will closeissue number #261