[Bug]: Read Time for Guides Not Implemented

[suman20041]

Description

The guides page is missing estimated reading time badges that should appear next to each section heading.

Steps to Reproduce

• Navigate to the Guides page (frontend/pages/guides.html)
• Look at any section heading (e.g., "Beginner Open Source Guide", "Step-by-Step Guide to Your First Pull Request")
• Observe that no reading time badge appears next to the heading
• Check browser console for any JavaScript errors

Expected Behavior

• Each guide section should display a reading time badge next to its heading
• Badge should show estimated minutes to read (e.g., "5 min read")
• Badge should have gold styling with a clock icon
• Reading time should be calculated based on paragraph word count (200 words/min average)

Actual Behavior

• No reading time badges appear on any guide sections
• Missing calculateReadTime() function in JavaScript
• Missing .read-time-badge CSS styles
• Users cannot estimate how long each guide will take to read

[github-actions]

Thanks @suman20041! 👋
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