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/db/migrations/0027_generalize_terminology.sql

@@ -0,0 +1,14 @@
+-- Generalize music-specific column names to generic terminology
+
+-- repair_ticket: instrument_description -> item_description
+ALTER TABLE repair_ticket RENAME COLUMN instrument_description TO item_description;
+
+-- repair_batch: instrument_count -> item_count
+ALTER TABLE repair_batch RENAME COLUMN instrument_count TO item_count;
+
+-- repair_service_template: instrument_type -> item_category
+ALTER TABLE repair_service_template RENAME COLUMN instrument_type TO item_category;
+
+-- Update module descriptions to be industry-agnostic
+UPDATE module_config SET description = 'Rental agreements and billing' WHERE slug = 'rentals';
+UPDATE module_config SET description = 'Scheduling, staff management, and billing' WHERE slug = 'lessons';