added PDF generation for quotation

PyroFetes/Specifications/Quotations/GetQuotationByIdWithProductsSpec.cs

@@ -0,0 +1,15 @@
+using Ardalis.Specification;
+using PyroFetes.Models;
+
+namespace PyroFetes.Specifications.Quotations;
+
+public class GetQuotationByIdWithProductsSpec : Specification<Quotation>
+{
+    public GetQuotationByIdWithProductsSpec(int quotationId)
+    {
+        Query
+            .Where(q => q.Id == quotationId)
+            .Include(q => q.QuotationProducts!)
+            .ThenInclude(qp => qp.Product);
+    }
+}