feat: add routes, model, controller and update related models relations

app/Models/Favorite.php

@@ -0,0 +1,40 @@
+<?php
+
+/**
+ * Created by Reliese Model.
+ */
+
+namespace App\Models;
+
+use Carbon\Carbon;
+use Illuminate\Database\Eloquent\Model;
+
+/**
+ * Class Favorite
+ * 
+ * @property int $id
+ * @property int $user_id
+ * @property int|null $tour_id
+ * @property int|null $flight_id
+ * @property Carbon|null $created_at
+ * @property Carbon|null $updated_at
+ *
+ * @package App\Models
+ */
+class Favorite extends Model
+{
+	protected $table = 'favorites';
+	public static $snakeAttributes = false;
+
+	protected $casts = [
+		'user_id' => 'int',
+		'tour_id' => 'int',
+		'flight_id' => 'int'
+	];
+
+	protected $fillable = [
+		'user_id',
+		'tour_id',
+		'flight_id'
+	];
+}