fix structure product categories table and crud product

app/Models/Stock.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class Stock extends Model
+{
+    use HasFactory;
+    protected $table = 'stock';
+    protected $fillable = [
+        'product_id',
+        'dealer_id',
+        'quantity',
+    ];
+
+    public function product()
+    {
+        return $this->belongsTo(Product::class);
+    }
+
+    public function dealer()
+    {
+        return $this->belongsTo(Dealer::class);
+    }
+}