Rename Forte to LunarFront, generalize for any small business

Rebrand from Forte (music-store-specific) to LunarFront (any small business):
- Package namespace @forte/* → @lunarfront/*
- Database forte/forte_test → lunarfront/lunarfront_test
- Docker containers, volumes, connection strings
- UI branding, localStorage keys, test emails
- All documentation and planning docs

Generalize music-specific terminology:
- instrumentDescription → itemDescription
- instrumentCount → itemCount
- instrumentType → itemCategory (on service templates)
- New migration 0027_generalize_terminology for column renames
- Seed data updated with generic examples
- RBAC descriptions updated

packages/backend/src/services/product.service.ts

@@ -8,7 +8,7 @@ import type {
   InventoryUnitCreateInput,
   InventoryUnitUpdateInput,
   PaginationInput,
-} from '@forte/shared/schemas'
+} from '@lunarfront/shared/schemas'
 import {
   withPagination,
   withSort,