feat: office address, multi-template SMS manager, hardcoded defaults with auto-seed

- Add streetAddress/city/state/zipCode fields to OfficeContact (schema + storage + UI)
- Support {officeAddress} variable in batch reminder SMS
- Replace single SMS template field with full CRUD template list (add/rename/edit/delete)
- Store SMS template list under _sms_template_list; first template synced to batch reminder
- Hardcode all AI chat template defaults into codebase (reminder SMS, greetings, fallback)
- Add seed-templates.ts that auto-seeds default templates for all users on server boot
- Update README: note that templates are auto-configured on first boot

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/db/shared/.prisma-zod-generator-manifest.json

@@ -1,7 +1,7 @@
 {
   "version": "1.0",
   "generatorVersion": "1.0.0",
-  "generatedAt": "2026-05-11T21:48:22.459Z",
+  "generatedAt": "2026-05-12T02:28:39.220Z",
   "outputPath": "/home/ee/Desktop/DentalManagementMH05/packages/db/shared",
   "files": [
     "schemas/enums/TransactionIsolationLevel.schema.ts",