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

package.json

@@ -1,6 +1,7 @@
 {
-  "name": "forte",
+  "name": "lunarfront",
   "private": true,
+  "packageManager": "bun@1.3.11",
   "workspaces": ["packages/*"],
   "scripts": {
     "dev": "turbo run dev",