feat(api-docs): extract API docs viewer into standalone module

Move the Swagger UI viewer from core (pages/admin/api-docs/) into
modules/api-docs/ as a self-contained module. Create module manifest
with routes, permission, sidebar.admin_nav_item slot, asset group,
and authorization policy. Remove API docs ability from core
OperationsAuthorizationPolicy and UiCapabilityMap. Remove hardcoded
sidebar nav item — now contributed via module slot. Add
admin-automation group meta to sidebar template for module nav items.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

modules/api-docs/module.php

@@ -0,0 +1,66 @@
+<?php
+
+/**
+ * API Docs module manifest.
+ *
+ * Provides a Swagger UI viewer for the project's OpenAPI specification.
+ */
+return [
+    'id' => 'api-docs',
+    'version' => '1.0.0',
+    'enabled_by_default' => false,
+    'load_order' => 20,
+    'requires' => [],
+
+    'routes' => [
+        ['path' => 'admin/api-docs', 'target' => 'api-docs'],
+        ['path' => 'admin/api-docs/spec', 'target' => 'api-docs/spec'],
+    ],
+    'public_paths' => [],
+    'container_registrars' => [
+        \MintyPHP\Module\ApiDocs\ApiDocsContainerRegistrar::class,
+    ],
+
+    'ui_slots' => [
+        'sidebar.admin_nav_item' => [
+            [
+                'key' => 'api-docs',
+                'group' => 'admin-automation',
+                'label' => 'API docs',
+                'path' => 'admin/api-docs',
+                'permission' => 'api_docs.view',
+                'order' => 300,
+            ],
+        ],
+    ],
+
+    'authorization_policies' => [
+        \MintyPHP\Module\ApiDocs\ApiDocsAuthorizationPolicy::class,
+    ],
+
+    'search_resources' => [],
+
+    'asset_groups' => [
+        'api-docs' => [
+            'modules/api-docs/css/vendor-overrides/swagger-ui.css',
+        ],
+    ],
+
+    'scheduler_jobs' => [],
+    'layout_context_providers' => [],
+    'session_providers' => [],
+
+    'permissions' => [
+        [
+            'key' => 'api_docs.view',
+            'description' => 'Can view API documentation',
+            'active' => true,
+            'is_system' => true,
+        ],
+    ],
+
+    'event_listeners' => [],
+    'deactivation_handler' => null,
+    'migrations_path' => null,
+    'i18n_path' => 'i18n',
+];