Implement Supplier Payment and Stock Management Enhancements

Enhance Stock Management Interface

Revamp README.md for enhanced clarity and presentation. Updated project description, added badges, reorganized features, and improved installation instructions. Introduced a table of contents and detailed project structure for better navigation.

Refactor Product and Stock Controllers to utilize dedicated services for improved organization and maintainability. Introduced ProductService and StockService to handle product and stock-related operations, respectively. Updated methods for category management, purchase handling, and product updates, ensuring consistent response formats and validation. Enhanced session handling for flash messages.

Update README.md to enhance project description, clarify features, and improve installation instructions. Added technology stack details and organized screenshots for better presentation.

Refactor SettingsController to streamline session handling and improve message redirection. Removed direct session manipulation in favor of using the with() method for flash messages in redirect responses.

Implement Supplier Management Features

Refactor StockController to use PurchaseService for purchase handling and add request validation. Introduced StorePurchaseRequest and UpdatePurchaseRequest for input validation. Implemented PurchaseService for managing purchase creation and updates, ensuring supplier balance adjustments. Added feature tests for purchase creation and updates.

Merge pull request #1 from nostum/master

StockController - protected property - swapped Purchase for purchase

Migration and supplyer module

minor

minor changes

Update readme.md

screenshot added