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>

templates/admin/lessons.php

@@ -0,0 +1,43 @@
+<?php
+declare(strict_types=1);
+
+if (! defined('ABSPATH')) {
+    exit;
+}
+
+/** @var list<\Unsupervised\Schedular\Model\Lesson> $lessons */
+?>
+<div class="wrap">
+    <h1><?php esc_html_e('Lessons', 'unsupervised-schedular'); ?></h1>
+
+    <?php if (empty($lessons)) : ?>
+        <p><?php esc_html_e('No upcoming lessons.', 'unsupervised-schedular'); ?></p>
+    <?php else : ?>
+        <table class="wp-list-table widefat fixed striped">
+            <thead>
+                <tr>
+                    <th><?php esc_html_e('Student', 'unsupervised-schedular'); ?></th>
+                    <th><?php esc_html_e('Instructor', 'unsupervised-schedular'); ?></th>
+                    <th><?php esc_html_e('Slot ID', 'unsupervised-schedular'); ?></th>
+                    <th><?php esc_html_e('Status', 'unsupervised-schedular'); ?></th>
+                    <th><?php esc_html_e('Notes', 'unsupervised-schedular'); ?></th>
+                </tr>
+            </thead>
+            <tbody>
+                <?php foreach ($lessons as $lesson) : ?>
+                    <?php
+                    $student    = get_userdata($lesson->studentId);
+                    $instructor = get_userdata($lesson->instructorId);
+                    ?>
+                    <tr>
+                        <td><?php echo esc_html($student ? $student->display_name : (string) $lesson->studentId); ?></td>
+                        <td><?php echo esc_html($instructor ? $instructor->display_name : (string) $lesson->instructorId); ?></td>
+                        <td><?php echo esc_html((string) $lesson->slotId); ?></td>
+                        <td><?php echo esc_html($lesson->status); ?></td>
+                        <td><?php echo esc_html($lesson->notes ?? ''); ?></td>
+                    </tr>
+                <?php endforeach; ?>
+            </tbody>
+        </table>
+    <?php endif; ?>
+</div>