Add KiCad API v2, orderdetail export control, EDA status indicator, BOM improvements

- Add KiCad API v2 endpoints (/kicad-api/v2) with volatile field support
  for stock and storage location (shown but not saved to schematic)
- Add kicad_export flag to Orderdetail entity for per-supplier SPN control
  (backward compatible: if no flag set, all SPNs exported as before)
- Add EDA completeness indicator column in parts datatable (bolt icon)
- Add ?minimal=true query param for faster category parts loading
- Improve category descriptions (use comment instead of URL when available)
- Improve BOM importer multi-footprint support: merge entries by Part-DB
  part ID when linked, tracking footprint variants in comments
- Fix KiCost manf/manf# fields always present (not conditional on orderdetails)
- Fix duplicate getEdaInfo() call in shouldPartBeVisible
- Consolidate supplier SPN and KiCost field generation into single loop

src/Form/Part/OrderdetailType.php

@@ -79,6 +79,11 @@ class OrderdetailType extends AbstractType
             'label' => 'orderdetails.edit.prices_includes_vat',
         ]);
 
+        $builder->add('kicad_export', CheckboxType::class, [
+            'required' => false,
+            'label' => 'orderdetails.edit.kicad_export',
+        ]);
+
         //Add pricedetails after we know the data, so we can set the default currency
         $builder->addEventListener(FormEvents::PRE_SET_DATA, function (FormEvent $event) use ($options): void {
             /** @var Orderdetail $orderdetail */