refactor: Split shipping_address into component fields for ShipLogic API

- Create migration to add shipping_street_address, shipping_local_area, shipping_city, shipping_zone, shipping_country, shipping_postcode, shipping_type
- Update Order model fillable array with new address component fields
- Remove address parsing logic from CourierService
- Use individual address fields directly in ShipLogic API payload
- Fields match ShipLogic API requirements (street_address, local_area, city, zone, code, country, type)
- Note: Custom orders address collection can be implemented later

database/migrations/2026_01_02_000003_split_shipping_address_into_components.php

@@ -0,0 +1,43 @@
+<?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::table('orders', function (Blueprint $table) {
+            // Add new address component columns
+            $table->string('shipping_street_address')->nullable()->after('shipping_address');
+            $table->string('shipping_local_area')->nullable()->after('shipping_street_address');
+            $table->string('shipping_city')->nullable()->after('shipping_local_area');
+            $table->string('shipping_zone')->nullable()->after('shipping_city');
+            $table->string('shipping_country')->default('ZA')->after('shipping_zone');
+            $table->string('shipping_postcode')->nullable()->after('shipping_country');
+            $table->enum('shipping_type', ['residential', 'business'])->default('residential')->after('shipping_postcode');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('orders', function (Blueprint $table) {
+            $table->dropColumn([
+                'shipping_street_address',
+                'shipping_local_area',
+                'shipping_city',
+                'shipping_zone',
+                'shipping_country',
+                'shipping_postcode',
+                'shipping_type',
+            ]);
+        });
+    }
+};