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/app/Services/CostCalculatorService.php

@@ -0,0 +1,53 @@
+<?php
+
+namespace Modules\CostCalculator\Services;
+
+use Modules\CostCalculator\Models\CostCalculator;
+
+class CostCalculatorService
+{
+    public function findAll($request)
+    {
+        return CostCalculator::when($request, function ($query) use ($request) {
+            if ($request->filled('country_id')) {
+                $query->whereRelation('institution', 'country_id', $request->country_id);
+            }
+
+            if ($request->filled('institution_id')) {
+                $query->where("institution_id", $request->institution_id);
+            }
+
+            if ($request->filled('programlevel_id')) {
+                $query->where("programlevel_id", $request->programlevel_id);
+            }
+
+            if ($request->filled('intake_id')) {
+                $intakeId = $request->intake_id;
+                $query->whereJsonContains('intakes', $intakeId);
+            }
+
+            if ($request->filled('status')) {
+                $query->where('status', $request->status);
+            }
+
+            if ($request->filled('search')) {
+                $search = $request->search;
+                $query->where('title', 'like', "%{$search}%");
+            }
+
+            if ($request->filled('location')) {
+                $location = $request->location;
+                $query->where('location', 'like', "%{$location}%");
+            }
+        })->latest()->paginate(10)->withQueryString();
+    }
+
+    public function pluck(callable $query = null)
+    {
+        $baseQuery = CostCalculator::query();
+        if (is_callable($query)) {
+            $query($baseQuery);
+        }
+        return $baseQuery->pluck('title', 'id');
+    }
+}