Initial plugin scaffold: lesson scheduling WordPress plugin

- Custom DB tables for availability slots and lesson bookings
- Instructor (wp-admin) and student (front-end) roles with custom capabilities
- REST API under us-scheduler/v1 for availability CRUD and booking
- [us_booking] and [us_student_login] shortcodes for student front end
- PHPUnit + Brain\Monkey unit test suite (29 tests)
- Gitea Actions CI: lint, PHPStan, tests on PHP 8.1/8.2/8.3, no-debug check
- Feature docs under docs/features/

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

unsupervised-schedular.php

@@ -0,0 +1,41 @@
+<?php
+/**
+ * Plugin Name: Unsupervised Scheduler
+ * Plugin URI:  https://unsupervised.ca
+ * Description: Instructor/student lesson scheduling for WordPress.
+ * Version:     1.0.0
+ * Requires at least: 6.0
+ * Requires PHP: 8.1
+ * Author:      Unsupervised
+ * License:     GPL-2.0-or-later
+ * Text Domain: unsupervised-schedular
+ */
+
+declare(strict_types=1);
+
+namespace Unsupervised\Schedular;
+
+if (! defined('ABSPATH')) {
+    exit;
+}
+
+define('USC_VERSION', '1.0.0');
+define('USC_PLUGIN_FILE', __FILE__);
+define('USC_PLUGIN_DIR', plugin_dir_path(__FILE__));
+define('USC_PLUGIN_URL', plugin_dir_url(__FILE__));
+define('USC_TABLE_AVAILABILITY', $GLOBALS['wpdb']->prefix . 'us_availability');
+define('USC_TABLE_LESSONS', $GLOBALS['wpdb']->prefix . 'us_lessons');
+
+require_once USC_PLUGIN_DIR . 'vendor/autoload.php';
+
+register_activation_hook(__FILE__, static function (): void {
+    (new Installer())->run();
+});
+
+register_deactivation_hook(__FILE__, static function (): void {
+    flush_rewrite_rules();
+});
+
+add_action('plugins_loaded', static function (): void {
+    Plugin::boot();
+});