fixes on mail templates, change order edit layout, add DeliveryTypes, DeliveryTypeCalculations & DeliveryPackages

app/Models/Shop/DeliveryPackage.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace App\Models\Shop;
+
+use Illuminate\Database\Eloquent\Model;
+
+class DeliveryPackage extends Model
+{
+    protected $guarded = ['id'];
+    protected $table = 'shop_delivery_packages';
+    
+    public function scopeByWeight($query, $weight)
+    {
+        return $query->orderBy('weight')->where($this->table . '.weight', '>=', $weight);
+    }
+}