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.

config/constants.php

@@ -78,4 +78,9 @@ return [
         14 => 'Archived',
     ],
 
+    'living_status'=> [
+        1 => 'Alone',
+        2 => 'With Spouse',
+        3 => 'With Spouse and Child',
+    ]
 ];