Description

Fix Bid System & Add Notification System

Backend

• Implemented Auction Controller - Added complete auction management
• Updated Auction Model

Frontend

• Notification System - Migrated to Sonner toasts:
• edited ProductDetail Page & CartContext
• in Payment Page - notifications for each purchased item on successful payment

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Semver Changes

• Patch (bug fix, no new features)
• Minor (new features, no breaking changes)
• Major (breaking changes)

Issues

closes #16

List any issues that this pull request closes.

Checklist

• I have read the Contributing Guidelines.