ci(gitea): shared composite actions + pipeline generator for Gitea Actions

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AqpXh3hQMMaC74pTjFq4it

Gitea 1.25 cannot run reusable workflows (workflow_call), so the logic of
deploy-app.yml, smoke.yml and ci.yml moves into composite actions under
.gitea/actions/, and each repo gets a thin pipeline rendered by
tools/gitea-pipeline/render.py from repos.json. .github/workflows is left
untouched (Gitea ignores it once .gitea/workflows exists).

.gitea/actions/ci-phpunit/action.yml

@@ -0,0 +1,65 @@
+name: CI - PHPUnit
+description: >-
+  composer test for one PHP version (Gitea port of the phpunit job). For
+  tests=wp-framework the caller declares a `mysql` service; on Gitea runners it is
+  reached by its service name, not 127.0.0.1 as on GitHub VMs.
+inputs:
+  php:
+    required: true
+  tests:
+    description: "stubs | brain-monkey | wp-framework"
+    required: false
+    default: stubs
+  db_host:
+    required: false
+    default: mysql
+runs:
+  using: composite
+  steps:
+    - name: Install subversion (wp-framework only)
+      if: ${{ inputs.tests == 'wp-framework' }}
+      shell: bash
+      run: command -v svn >/dev/null || (sudo apt-get update -qq && sudo apt-get install -y --no-install-recommends subversion)
+
+    - name: Setup PHP ${{ inputs.php }}
+      uses: shivammathur/setup-php@v2
+      with:
+        php-version: ${{ inputs.php }}
+        coverage: none
+        tools: composer:v2
+        extensions: ${{ inputs.tests == 'wp-framework' && 'mysqli' || '' }}
+
+    - name: Install Composer dependencies
+      shell: bash
+      run: composer install --no-progress --no-interaction --prefer-dist
+
+    - name: Wait for MySQL (wp-framework only)
+      if: ${{ inputs.tests == 'wp-framework' }}
+      shell: bash
+      env:
+        DB_HOST: ${{ inputs.db_host }}
+      run: |
+        for i in $(seq 1 30); do
+          if (exec 3<>/dev/tcp/$DB_HOST/3306) 2>/dev/null; then echo "MySQL is up"; exit 0; fi
+          echo "Waiting for MySQL... ($i/30)"; sleep 2
+        done
+        echo "::error::MySQL at $DB_HOST:3306 never came up"; exit 1
+
+    - name: Install WordPress test suite (wp-framework only)
+      # skip-db-create=true: the service already created wp_tests.
+      # WP_CORE_DIR must end with a slash (concatenated verbatim into ABSPATH).
+      if: ${{ inputs.tests == 'wp-framework' }}
+      shell: bash
+      env:
+        WP_TESTS_DIR: /tmp/wordpress-tests-lib
+        WP_CORE_DIR: /tmp/wordpress/
+        DB_HOST: ${{ inputs.db_host }}
+      run: |
+        chmod +x bin/install-wp-tests.sh
+        bin/install-wp-tests.sh wp_tests root root "$DB_HOST:3306" latest true
+
+    - name: Run PHPUnit
+      shell: bash
+      env:
+        WP_TESTS_DIR: /tmp/wordpress-tests-lib
+      run: composer test