add Shell fake

Author: gwleuverink

resources/views/docs/desktop/2/testing/shell.md

@@ -0,0 +1,29 @@
+---
+title: Shell
+order: 100
+---
+
+# Fake Shell
+
+## Example test case
+
+```php
+use Native\Desktop\Facades\Shell;
+
+#[\PHPUnit\Framework\Attributes\Test]
+public function example(): void
+{
+    Shell::fake();
+
+    $this->get('/whatever-action');
+
+    Shell::assertOpenExternal('https://some-url.test');
+}
+```
+
+## Available assertions
+
+- `assertShowInFolder`
+- `assertOpenFile`
+- `assertTrashFile`
+- `assertOpenExternal`