feat(configurator): 'Add From Prior SO' sub-wizard for repeat orders

Task B4. New fp.add.from.so.wizard transient model: given the current
direct-order wizard + customer, lists the customer's prior confirmed
sale orders, lets the estimator tick source lines, and clones them
into fp.direct.order.line rows (part, coating, treatments, qty,
price, deadline, rush, WO group, description).

Button "+ Add From Prior SO" lives on the Lines tab of the main
wizard, visible once the customer is picked. Sub-wizard rejects
source lines that predate the new plating fields (no x_fc_part_catalog_id).

Smoke-tested on odoo-entech: copying all 3 lines of S00066 onto a
fresh wizard reproduces part/coating/qty/price correctly.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

fusion_plating/fusion_plating_configurator/__manifest__.py

@@ -50,6 +50,7 @@ Provides:
         'views/fp_configurator_menu.xml',
         'views/fp_sale_description_template_views.xml',
         'wizard/fp_direct_order_wizard_views.xml',
+        'wizard/fp_add_from_so_wizard_views.xml',
         'wizard/fp_part_catalog_import_wizard_views.xml',
         'data/fp_sale_description_template_data.xml',
     ],