chore: Update Dockerfile to install WeasyPrint dependencies
feat: Enhance ShopOrderModelAdmin with invoice download buttons
feat: Implement invoice generation for OrderModel and ShopOrderModel
feat: Send invoice to shop's Telegram chat upon ShopOrderModel creation
feat: Create Celery task to send shop order invoice via Telegram
feat: Add invoice download endpoints for OrderModel and ShopOrderModel
feat: Implement views for downloading order and shop order invoices
chore: Update requirements.txt to include necessary packages for PDF generation
feat: Create HTML templates for order and shop order invoices