Fix pathway page virtualization

[pari7maheshwari]

Description

This PR fixes issues in the pathway page by improving virtualization support . The changes ensure smoother rendering of large pathway datasets while maintaining type safety and application stability.

Changes Made

• Added the required virtualization dependency.
• Improved pathway page rendering behavior and code reliability.
• Verified that the application builds and runs successfully after the changes.

Fixes #622

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

• Local testing
• Vercel Preview Deployment

Test Details

• Installed dependencies and verified successful project startup.
• Tested pathway page rendering locally.
• Verified virtualization functionality and scrolling behavior.
• Confirmed no TypeScript compilation errors related to the modified code.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings or errors
• I have checked that the "DevPath India" branding remains intact

##Screenshot After updation :