add necessary package and setup

config/booking.php

@@ -0,0 +1,32 @@
+<?php
+
+return [
+
+    /*
+    |--------------------------------------------------------------------------
+    | Vehicle Option Toggles
+    |--------------------------------------------------------------------------
+    |
+    | Blunt on/off switches for Vehicle Options that have no real inventory
+    | tracking in v1 (see domain.md §2). Front Seat has no toggle — it is
+    | always selectable, only capped per-booking by the max below.
+    |
+    */
+
+    'back_seat_enabled' => env('BOOKING_BACK_SEAT_ENABLED', true),
+
+    'whole_vehicle_enabled' => env('BOOKING_WHOLE_VEHICLE_ENABLED', true),
+
+    /*
+    |--------------------------------------------------------------------------
+    | Front Seat Limit
+    |--------------------------------------------------------------------------
+    |
+    | The only inventory rule enforced in v1: max Front Seats a single
+    | booking may request.
+    |
+    */
+
+    'front_seat_max_per_booking' => env('BOOKING_FRONT_SEAT_MAX_PER_BOOKING', 1),
+
+];