feat: add ping public API endpoint

api/ping/GET.php

@@ -0,0 +1,23 @@
+<?php
+
+	use Reflect\{Response, Path};
+
+	use VLW\API\API;
+
+	require_once Path::root("src/API/API.php");
+
+	final class GET_Ping extends API {
+		public function __construct() {
+			parent::__construct();
+		}
+
+		public function main(): Response {
+			return new Response([
+				"ping"     => "pong",
+				"GET"      => $_GET,
+				"POST"     => $_POST,
+				"HEADERS"  => getallheaders(),
+				"datetime" => new DateTimeImmutable(),
+			]);
+		}
+	}

src/Database/Seeds/data/vlw_reflect.sql

@@ -10,6 +10,7 @@ SET time_zone = "+00:00";
 
 TRUNCATE TABLE `acl`;
 INSERT INTO `acl` (`ref_group`, `ref_endpoint`, `method`) VALUES
+(NULL, 'ping', 'GET'),
 (NULL, 'coffee', 'GET'),
 (NULL, 'languages', 'GET'),
 (NULL, 'update', 'GET'),
@@ -19,6 +20,7 @@ INSERT INTO `acl` (`ref_group`, `ref_endpoint`, `method`) VALUES
 
 TRUNCATE TABLE `endpoints`;
 INSERT INTO `endpoints` (`id`, `active`) VALUES
+('ping', 1),
 ('coffee', 1),
 ('languages', 1),
 ('update', 1),