feat: create designers table and update Park model to use Operator for ownership

database/migrations/2024_02_25_194400_create_designers_table.php

@@ -0,0 +1,27 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::create('designers', function (Blueprint $table) {
+            $table->id();
+            $table->string('name');
+            $table->string('slug')->unique();
+            $table->text('bio')->default('');
+            $table->timestamps();
+
+            // Index for faster lookups
+            $table->index('slug');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('designers');
+    }
+};