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/05_trusted_hosts.yml

@@ -0,0 +1,19 @@
+- name: "Set trusted_host_patterns for canonical domains"
+  vars:
+    patterns: "{{ DRUPAL_DOMAINS
+                  | map('regex_replace','\\\\.','\\\\\\\\.')
+                  | map('regex_replace','^','^')
+                  | map('regex_replace','$','$')
+                  | list }}"
+    php_array: "{{ patterns | to_json }}"
+  command: >
+    docker exec -u root {{ DRUPAL_CONTAINER }} bash -lc
+    "php -r '
+    $f="{{ DRUPAL_DOCKER_CONF_PATH }}/settings.local.php";
+    $c=file_exists($f)?file_get_contents($f):"<?php\n";
+    // Remove existing assignment of $settings[\"trusted_host_patterns\"] (if any)
+    $c=preg_replace(\"/(\\\\$settings\\['trusted_host_patterns'\\]\\s*=).*?;/s\", \"\", $c);
+    $c.="\n\$settings[\'trusted_host_patterns\'] = ".var_export(json_decode("{{ php_array|e }}", true), true).";\n";
+    file_put_contents($f,$c);
+    '"
+  changed_when: true