ci: plugin-agnostic PR checks and package-then-release pipeline

- plugin-checks workflow: shopware-cli validate, package + built-JS assertion, phpunit
- release: validate, package from the merge commit, validate the zip, create the release
  via the Gitea API, publish the same zip to the Composer registry
- scripts/protect-main.sh sets required status checks via tea api
- bump to 0.1.0

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

.gitea/workflows/plugin-checks.yml

@@ -0,0 +1,100 @@
+name: plugin-checks
+
+# Plugin-agnostic: nothing below names this plugin. Name, version and paths come from composer.json.
+# shopware-cli is intentionally unpinned (latest); a red build after a CLI release means fix the config.
+
+on:
+  pull_request:
+    branches: [main]
+
+permissions:
+  contents: read
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: shivammathur/setup-php@v2
+        with:
+          php-version: '8.3'
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+      - name: Install shopware-cli
+        run: |
+          curl -sL https://github.com/shopware/shopware-cli/releases/latest/download/shopware-cli_Linux_x86_64.tar.gz | tar -xz -C /tmp shopware-cli
+          sudo install /tmp/shopware-cli /usr/local/bin/shopware-cli || install /tmp/shopware-cli /usr/local/bin/shopware-cli
+      - name: Validate extension
+        run: shopware-cli extension validate .
+
+  package:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+      - name: Install shopware-cli
+        run: |
+          curl -sL https://github.com/shopware/shopware-cli/releases/latest/download/shopware-cli_Linux_x86_64.tar.gz | tar -xz -C /tmp shopware-cli
+          sudo install /tmp/shopware-cli /usr/local/bin/shopware-cli || install /tmp/shopware-cli /usr/local/bin/shopware-cli
+      - name: Package extension
+        run: shopware-cli extension package . --output-directory .build --filename package.zip --git-commit "$GITHUB_SHA"
+      - name: Validate packaged zip
+        run: shopware-cli extension validate .build/package.zip
+      - name: Assert built JS is in the zip
+        run: |
+          set -e
+          LIST=$(unzip -Z1 .build/package.zip)
+          if [ -f src/Resources/app/administration/src/main.js ] || [ -f src/Resources/app/administration/src/main.ts ]; then
+            echo "$LIST" | grep -q 'Resources/public/administration/js/' || { echo "::error::admin entry exists but the zip has no built admin JS"; exit 1; }
+          fi
+          if [ -f src/Resources/app/storefront/src/main.js ] || [ -f src/Resources/app/storefront/src/main.ts ]; then
+            echo "$LIST" | grep -q 'Resources/app/storefront/dist/' || { echo "::error::storefront entry exists but the zip has no built storefront JS"; exit 1; }
+          fi
+
+  phpunit:
+    runs-on: ubuntu-latest
+    services:
+      database:
+        image: mariadb:11.4
+        env:
+          MARIADB_ROOT_PASSWORD: root
+        options: >-
+          --health-cmd="healthcheck.sh --connect --innodb_initialized"
+          --health-interval=5s --health-timeout=5s --health-retries=20
+    env:
+      DATABASE_URL: mysql://root:root@database:3306/shopware
+      APP_ENV: test
+      APP_URL: http://localhost
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          path: plugin-src
+      - uses: shivammathur/setup-php@v2
+        with:
+          php-version: '8.3'
+          extensions: gd, intl, pdo_mysql, zip, curl, mbstring, dom, xml, fileinfo, sodium, bcmath
+          tools: composer
+      - name: Resolve plugin name
+        run: |
+          # plugin directory name = short class name of extra.shopware-plugin-class
+          CLASS=$(jq -r '.extra["shopware-plugin-class"]' plugin-src/composer.json)
+          echo "PLUGIN_NAME=${CLASS##*\\}" >> "$GITHUB_ENV"
+      - name: Create Shopware 6.6 project
+        run: composer create-project shopware/production:6.6.* shopware --no-interaction --no-scripts
+      - name: Install Shopware and the plugin
+        working-directory: shopware
+        run: |
+          set -e
+          composer require --dev phpunit/phpunit:^10 --no-interaction
+          bin/console system:install --basic-setup --create-database --force --no-interaction
+          cp -r ../plugin-src "custom/plugins/${PLUGIN_NAME}"
+          bin/console plugin:refresh
+          bin/console plugin:install --activate "${PLUGIN_NAME}"
+      - name: Run phpunit
+        working-directory: shopware
+        run: vendor/bin/phpunit -c "custom/plugins/${PLUGIN_NAME}/phpunit.xml"