feat(web-app-drupal): add Drupal role, OIDC config, and wiring

- networks: add web-app-drupal subnet 192.168.104.80/28
- ports: map localhost http port 8060
- add role files: tasks, vars, schema, users, templates (Dockerfile, docker-compose, settings.local.php, upload.ini)
- add docs: README.md and Administration.md

Ref: https://chatgpt.com/share/690535c5-b55c-800f-8556-5335a6b8a33f

roles/web-app-drupal/tasks/02_install.yml

@@ -0,0 +1,15 @@
+- name: "Run Drupal site:install via Drush"
+  no_log: "{{ MASK_CREDENTIALS_IN_LOGS | bool }}"
+  command: >
+    docker exec {{ DRUPAL_CONTAINER }} bash -lc
+    "/var/www/html/vendor/bin/drush -r {{ DRUPAL_DOCKER_HTML_PATH }} si standard -y
+    --site-name='{{ applications | get_app_conf(application_id, 'title', True) }}'
+    --account-name='{{ applications | get_app_conf(application_id, 'users.administrator.username') }}'
+    --account-mail='{{ applications | get_app_conf(application_id, 'users.administrator.email', True) }}'
+    --account-pass='{{ applications | get_app_conf(application_id, 'credentials.administrator_password', True) }}'
+    --uri='{{ DRUPAL_URL }}'"
+  args:
+    chdir: "{{ docker_compose.directories.instance }}"
+  register: drupal_install
+  changed_when: "'Installation complete' in drupal_install.stdout"
+  failed_when: false