fix(superadmin): stabilize knowledge base nav and docs grouping

app/Filament/SuperAdmin/Pages/InternalDocsPage.php

@@ -0,0 +1,42 @@
+<?php
+
+namespace App\Filament\SuperAdmin\Pages;
+
+use App\Filament\Clusters\RareAdmin\RareAdminCluster;
+use BackedEnum;
+use Filament\Pages\Page;
+use UnitEnum;
+
+class InternalDocsPage extends Page
+{
+    protected static ?string $cluster = RareAdminCluster::class;
+
+    protected static null|string|BackedEnum $navigationIcon = 'heroicon-o-book-open';
+
+    protected static null|string|UnitEnum $navigationGroup = null;
+
+    protected static ?int $navigationSort = 18;
+
+    public static function getNavigationLabel(): string
+    {
+        return __('admin.nav.internal_docs');
+    }
+
+    public static function getNavigationGroup(): UnitEnum|string|null
+    {
+        return __('admin.nav.infrastructure');
+    }
+
+    public static function getNavigationUrl(): string
+    {
+        return url('/super-admin/docs');
+    }
+
+    public static function getNavigationItemActiveRoutePattern(): string|array
+    {
+        return [
+            static::getRouteName(),
+            'filament.superadmin-kb.*',
+        ];
+    }
+}