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/lib/Module/ApiDocs/ApiDocsContainerRegistrar.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace MintyPHP\Module\ApiDocs;
+
+use MintyPHP\App\AppContainer;
+use MintyPHP\App\Container\ContainerRegistrar;
+use MintyPHP\Service\Access\PermissionService;
+
+final class ApiDocsContainerRegistrar implements ContainerRegistrar
+{
+    public function register(AppContainer $container): void
+    {
+        $container->set(ApiDocsAuthorizationPolicy::class, static fn (AppContainer $c): ApiDocsAuthorizationPolicy => new ApiDocsAuthorizationPolicy(
+            $c->get(PermissionService::class)
+        ));
+    }
+}