Refactor social link rendering into shared reusable component

[Rohan-Ver-ma]

Description

This PR removes duplicated social link rendering logic by introducing a shared SocialLinks component and replacing repeated JSX blocks in the affected views.

Fixes #572

What this PR does

• Adds a shared SocialLinks component as a single source of links.
• Updates contributor card, search results, and contributor details to use the shared component.
• Preserves existing behavior and visual output

Why this improves the codebase

• Better maintainability: future social-link changes are made once.
• Better consistency: same logic and styling path across pages.
• Better readability: parent components are shorter and easier to understand.
• Lower regression risk from duplicated UI logic.

Checklist

• PR title is clear and descriptive
• Changes follow project conventions
• No unrelated changes included
• Confirmed behavior remains functionally the same after refactor