Add subcontract jobs section to work order PDF

Loads subcontractJobs.subcontractor relation and renders a new table
in the PDF after parts: description, subcontractor, category, client price.
Adds ru/en translations for the new section labels.

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

app/Services/WorkOrderPdfService.php

@@ -9,7 +9,7 @@ class WorkOrderPdfService
 {
     public function generate(WorkOrder $wo): \Barryvdh\DomPDF\PDF
     {
-        $wo->load(['client', 'vehicle', 'master', 'works.master', 'parts', 'payments']);
+        $wo->load(['client', 'vehicle', 'master', 'works.master', 'parts', 'payments', 'subcontractJobs.subcontractor']);
         $company = $wo->company ?: \App\Models\Central\Company::find($wo->company_id);
 
         $themeColor = $company?->settings['theme_color'] ?? '#3B82F6';