search bar added to the blogs page

[sarthakmahapatra05]

Description

This PR adds a search bar to the Blogs page, enabling users to easily find specific blogs as the number of blogs grows.

Changes Made

• Backend (server/controllers/BlogControl.js): Modified getAllBlogs to accept a q query parameter and filter blogs using MongoDB regex on title, description, and author.username fields.
• API (src/service/oprations/BlogApi.jsx): Updated getAllBlogs function to include search query in API calls.
• Frontend (src/Pages/Blog.jsx): Added search input bar above the blog grid with debouncing, URL query parameter support, and responsive design.

Features

• Real-time search with debouncing to reduce API calls
• Search by title, author, or description
• Shareable search URLs via query parameters
• Pagination resets on new search
• Responsive and accessible UI
• "No results found" message for empty searches

Testing

• Verified search filters blogs correctly
• Confirmed URL updates with search terms
• Tested responsive design on different screen sizes
• Ensured accessibility with proper ARIA labels

Close #159 (if applicable)

[netlify]

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