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>

.gitea/workflows/ci.yml

@@ -0,0 +1,102 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+      - develop
+  pull_request:
+
+jobs:
+  lint:
+    name: Coding Standards
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: '8.3'
+          tools: composer:v2
+
+      - name: Cache Composer packages
+        uses: actions/cache@v3
+        with:
+          path: ~/.composer/cache
+          key: composer-${{ hashFiles('composer.json') }}
+
+      - name: Install dependencies
+        run: composer install --prefer-dist --no-progress --no-interaction
+
+      - name: Run PHPCS
+        run: composer cs
+
+  static-analysis:
+    name: PHPStan
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: '8.3'
+          tools: composer:v2
+
+      - name: Cache Composer packages
+        uses: actions/cache@v3
+        with:
+          path: ~/.composer/cache
+          key: composer-${{ hashFiles('composer.json') }}
+
+      - name: Install dependencies
+        run: composer install --prefer-dist --no-progress --no-interaction
+
+      - name: Run PHPStan
+        run: composer lint
+
+  test:
+    name: Tests (PHP ${{ matrix.php }})
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        php:
+          - '8.1'
+          - '8.2'
+          - '8.3'
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          extensions: mbstring, intl
+          coverage: none
+          tools: composer:v2
+
+      - name: Cache Composer packages
+        uses: actions/cache@v3
+        with:
+          path: ~/.composer/cache
+          key: ${{ matrix.php }}-composer-${{ hashFiles('composer.json') }}
+
+      - name: Install dependencies
+        run: composer install --prefer-dist --no-progress --no-interaction
+
+      - name: Run PHPUnit
+        run: composer test
+
+  no-debug:
+    name: No Debug Code
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Check for debug statements
+        run: |
+          if grep -rn --include="*.php" -E "(var_dump|var_export|print_r|error_log|dd\(|dump\()" src/; then
+            echo "Debug code found in src/ — please remove before merging."
+            exit 1
+          fi