Added City model, resource and its API.

database/seeders/CitySeeder.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace Database\Seeders;
+
+use Illuminate\Database\Console\Seeds\WithoutModelEvents;
+use Illuminate\Database\Seeder;
+use App\Models\City;
+
+class CitySeeder extends Seeder
+{
+    /**
+     * Run the database seeds.
+     */
+    public function run(): void
+    {
+        City::factory()
+            ->count(10)
+            ->create();
+    }
+}