Add launcher specific stuff

database/launcher/versions.php

@@ -0,0 +1,13 @@
+<?php
+require __DIR__ . '/../../incl/util.php';
+setJsonHeader();
+$conn = newConnection();
+
+$stmt = $conn->prepare("SELECT * FROM launcherversions ORDER BY id DESC");
+$stmt->execute();
+
+$result = $stmt->get_result();
+
+echo json_encode(array_map(fn($row) => ['id' => $row['id'], 'version' => $row['version'], 'releaseDate' => $row['releaseDate'], 'displayName' => empty($row['displayName']) ? $row['version'] : $row['displayName'], 'platforms' => json_decode($row['platforms']), 'downloadUrls' => json_decode($row['downloadUrls']), 'executables' => json_decode($row['executables'])], $result->fetch_all(MYSQLI_ASSOC)));
+
+$conn->close();