- Added new Article model in app/models
- Created migration files for Article model
- Updated db/schema.rb with latest changes
- Included Article fixtures for testing
- Added Design Document for Update-1.0

…ign document.

- New responsive layouts for article management and a search feature that orders results by query relevance have been added. Basic styling is applied across the platform for consistency.

>
> - Redesigned web pages for improved aesthetics using application.css.
>   This includes updates to layout, color scheme, typography, and responsive design.
> - Enhanced search functionality for increased accuracy.
>   The search algorithm now prioritizes title matches over content and sorts results by recent dates.
>   Improved query processing for handling a variety of input patterns.