feat: Add CostCalculator module with CRUD functionality and frontend integration

- Created new module for CostCalculator with necessary routes and controllers.
- Implemented views for creating, editing, and displaying costs.
- Added form partials for cost input with validation.
- Integrated living status options in the form.
- Developed frontend logic for cost calculation steps with dynamic UI updates.
- Included necessary assets (JS and SCSS) for styling and functionality.
- Updated constants for living status options.
- Enhanced existing client-side cost calculator page with new features.

Modules/CostCalculator/config/config.php

@@ -0,0 +1,5 @@
+<?php
+
+return [
+    'name' => 'CostCalculator',
+];