create crud product categories and partial update crud products with dealers stock

database/migrations/2025_05_28_113228_create_product_categories_table.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class CreateProductCategoriesTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('product_categories', function (Blueprint $table) {
+            $table->id();
+            $table->string('name');
+            $table->softDeletes();
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('product_categories');
+    }
+}

database/migrations/2025_05_28_113324_create_products_table.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class CreateProductsTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('products', function (Blueprint $table) {
+            $table->id();
+            $table->string('code')->unique();
+            $table->string('name');
+            $table->text('description')->nullable();
+            $table->foreignId('product_category_id')->constrained()->onDelete('cascade');
+            $table->softDeletes();
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('products');
+    }
+}

database/migrations/2025_05_28_175140_create_stock_table.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class CreateStockTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('stock', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('product_id')->constrained()->onDelete('cascade');
+            $table->foreignId('dealer_id')->constrained()->onDelete('cascade');
+            $table->integer('quantity')->default(0);
+            $table->timestamps();
+
+            $table->unique(['product_id','dealer_id']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('stock');
+    }
+}