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/database/migrations/2025_08_13_102211_create_cost_calculators_table.php

@@ -0,0 +1,38 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('cost_calculators', function (Blueprint $table) {
+            $table->id();
+            $table->unsignedInteger('country_id')->nullable();
+            $table->unsignedInteger('programlevel_id')->nullable();
+            $table->unsignedInteger('program_id')->nullable();
+            $table->unsignedInteger('living_status_id')->nullable();
+            $table->json('living_cost')->nullable();
+            $table->json('accomodation_cost')->nullable();
+            $table->json('onetime_cost')->nullable();
+            $table->json('other_services')->nullable();
+            $table->unsignedInteger('createdby')->nullable();
+            $table->unsignedInteger('updatedby')->nullable();
+            $table->boolean('status')->default(1);
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('cost_calculators');
+    }
+};