feat(configurator): C6 - Express Orders form view + menu (v1, stock widgets)

Spreadsheet-style flat entry view on the existing fp.direct.order.wizard
model. Renders:
- Customer + Shipping prominent (row 1)
- PO block (PO# + attachment + Pending toggle + Expected date)
- Scheduling/Lead Time + Pricing/Pricelist (row 2)
- Order Lines spreadsheet with: Part #, Specification, Line Job #,
  Thickness, Mask toggle, Bake text, Internal Notes, Serials, Qty,
  Price, Subtotal, Process/Recipe (optional-show)
- Notes + Terms split (internal vs customer-facing)
- View-switch buttons to bounce between Express and Legacy on a draft

New menu: Plating > Sales > '+ New Express Order' (sequence 3).
Same DB rows as legacy view (view_source='express' for routing).

v1 deferments: OWL FpExpressPartCell (multi-row part cell), OWL
FpExpressBakePill (click-to-edit), DWG/OPEN/+bulk inline buttons,
custom SCSS, quick-create part view, pricelist display_name override.
These come in later iterations.

fusion_plating/fusion_plating_configurator/__manifest__.py

@@ -50,6 +50,7 @@ Provides:
         'views/fp_sale_description_template_views.xml',
         'views/fp_serial_views.xml',
         'wizard/fp_direct_order_wizard_views.xml',
+        'views/fp_express_order_views.xml',
         'wizard/fp_add_from_so_wizard_views.xml',
         'wizard/fp_add_from_quote_wizard_views.xml',
         'wizard/fp_quote_promote_wizard_views.xml',