Add optional Project Name field to quotes, jobs, and printed documents

- Add ProjectName (nvarchar 100, nullable) to Quote and Job entities;
  migration AddProjectNameToQuotesAndJobs applied
- Add ProjectName to all relevant DTOs: QuoteDto/Create/Update,
  JobDto/List/Create/Update, InvoiceDto (mapped from Job.ProjectName
  via AutoMapper so the invoice PDF picks it up without a separate column)
- Form field added after Customer PO in Quote Create/Edit and Job Create/Edit
- CreateJobFromQuote copies ProjectName from quote to job automatically
- Details views (Quote and Job) display Project when set
- Printable quote PDF: Project row in the quote details block
- Work order: Project row in customer/job info section
- Invoice PDF: Project shown in the Job Reference block alongside Job # and PO #

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/PowderCoating.Web/Views/Quotes/Details.cshtml

@@ -183,6 +183,10 @@
                             {
                                 <p><strong>Customer PO:</strong> @Model.CustomerPO</p>
                             }
+                            @if (!string.IsNullOrEmpty(Model.ProjectName))
+                            {
+                                <p><strong>Project:</strong> @Model.ProjectName</p>
+                            }
                         </div>
                     </div>
                     @if (!string.IsNullOrEmpty(Model.Description))