Introduce self-serve module with lane management functionality

- Added `selfserve_lane` class to handle self-serve lane operations.
- Implemented commands (START, STOP, RESET) and states (IDLE, IN_WASH, FAULT, etc.) for lane lifecycle.
- Introduced traits for managing lane status, mode, state, caching, and port control.
- Added enums for cohesive type definitions (`selfserve_lane_command`, `selfserve_lane_status`, `selfserve_lane_state`, etc.).
- Configured `/modules/self-serve/lane/status` route to expose lane state and status via API.
- Linked self-serve configuration via `selfserve_c` and `selfserve_enabled_c` for module toggling.
- Integrated lane caching logic with Redis for performance improvements.
- Updated `index.php` to include the self-serve module.

services/nginx/app/modules/selfserve/selfserve_c.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace modules\selfserve;
+require_once WD . '/modules/selfserve/config/selfserve_enabled_c.php';
+
+use modules\selfserve\config\selfserve_enabled_c;
+use traits\module_config_t;
+
+class selfserve_c
+{
+    use module_config_t;
+
+    /**
+     * The status of the module
+     * @var selfserve_enabled_c $enabled
+     */
+    public selfserve_enabled_c $enabled;
+
+    public function __construct()
+    {
+        $this->setupConfig('selfserve');
+        $this->allowUpdate([
+            selfserve_enabled_c::class
+        ]);
+        $this->enabled = new selfserve_enabled_c();
+    }
+}