refactor: restructure item interfaces and update related components

- Renamed LineItem interface to Item and adjusted properties accordingly.
- Updated CreateItemData and UpdateItemData interfaces to reflect new structure.
- Modified components to use the new Item interface, removing nested lines.
- Adjusted data binding in item configuration, main data, and other related components.
- Simplified item creation and editing logic by removing unnecessary nesting.
- Ensured all references to line items are updated to reflect the new structure.

backend/main.py

@@ -23,7 +23,7 @@ from fastapi.staticfiles import StaticFiles
 from pathlib import Path
 
 # Importar modelos para registrar con SQLAlchemy
-from api.v1.modules.a76.items.models import Item
+from api.v1.modules.a76.items.models import LineItem
 from api.v1.modules.a76.items.series.models import Serie
 from api.v1.modules.a76.parts.models import Part
 from api.v1.modules.a24.fa.fa_parts.models import FaPart
@@ -113,7 +113,7 @@ from api.v1.modules.a76.audit_log.events import register_audit_listeners
 from api.v1.modules.a76.clients_and_providers.models import ClientProvider
 from api.v1.modules.a76.customs_brokers.models import CustomsBroker
 from api.v1.modules.a76.parts.models import Part
-from api.v1.modules.a76.items.models import Item
+from api.v1.modules.a76.items.models import LineItem
 from api.v1.modules.a76.general_catalogs.company.models import Company
 
 # Reference Data
@@ -187,7 +187,7 @@ def register_audit():
             Pedimentos,
             InvoiceHeader,
             InvoiceSalesDetails,
-            Item,
+            LineItem,
             # Sidebar Core Modules
             ClientProvider,
             CustomsBroker,