Add Calculationpresets and Calculator modules with CRUD functionality, migrations, and UI components.

app/Models/Calculationpreset.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class Calculationpreset extends Model
+{
+    // Calculationpreset Model
+    protected $table = 'calculatorpresets';
+    protected $primaryKey = 'id';
+    protected $fillable = [
+        'name',
+        'description',
+        'price_kwh',
+        'factor_printer',
+        'factor_maintenance',
+        'factor_price'
+    ];
+}