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>

src/Plugin.php

@@ -0,0 +1,28 @@
+<?php
+declare(strict_types=1);
+
+namespace Unsupervised\Schedular;
+
+use Unsupervised\Schedular\Admin\AdminMenu;
+use Unsupervised\Schedular\Api\RestRegistrar;
+use Unsupervised\Schedular\Data\AvailabilityRepository;
+use Unsupervised\Schedular\Data\BookingRepository;
+use Unsupervised\Schedular\Frontend\ShortcodeRegistrar;
+use Unsupervised\Schedular\Roles\RoleManager;
+
+class Plugin
+{
+    public static function boot(): void
+    {
+        load_plugin_textdomain('unsupervised-schedular', false, dirname(plugin_basename(USC_PLUGIN_FILE)) . '/languages');
+
+        global $wpdb;
+        $availability = new AvailabilityRepository($wpdb);
+        $bookings     = new BookingRepository($wpdb);
+
+        (new RoleManager())->register();
+        (new AdminMenu($availability, $bookings))->register();
+        (new RestRegistrar($availability, $bookings))->register();
+        (new ShortcodeRegistrar($availability, $bookings))->register();
+    }
+}