Add Pest v4 guidelines

.ai/pest/4/core.blade.php

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+## Pest 4
+
+- Pest v4 is a huge upgrade to Pest and offers: browser testing, smoke testing, visual regression testing, test sharding, and faster type coverage.
+- Browser testing is incredibly powerful and useful for this project.
+- Browser tests should live in `tests/Browser/`.
+- Use the `search-docs` tool for detailed guidance on utilizing these features.
+
+### Browser Testing
+- You can use Laravel features like `Event::fake()`, `assertAuthenticated()`, and model factories within Pest v4 browser tests, as well as `RefreshDatabase` (when needed) to ensure a clean state for each test.
+- Interact with the page (click, type, scroll, select, submit, drag-and-drop, touch gestures, etc.) when appropriate to complete the test.
+- If requested, test on multiple browsers (Chrome, Firefox, Safari).
+- If requested, test on different devices and viewports (like iPhone 14 Pro, tablets, or custom breakpoints).
+- Switch color schemes (light/dark mode) when appropriate.
+- Take screenshots or pause tests for debugging when appropriate.
+
+### Example Tests
+@verbatim
+<code-snippet name="Pest Browser Test Example" lang="php">
+it('may reset the password', function () {
+    Notification::fake();
+
+    $this->actingAs(User::factory()->create());
+
+    $page = visit('/sign-in'); // Visit on a real browser...
+
+    $page->assertSee('Sign In')
+        ->assertNoJavascriptErrors() // or ->assertNoConsoleLogs()
+        ->click('Forgot Password?')
+        ->fill('email', '[email protected]')
+        ->click('Send Reset Link')
+        ->assertSee('We have emailed your password reset link!')
+
+    Notification::assertSent(ResetPassword::class);
+});
+</code-snippet>
+@endverbatim
+
+@verbatim
+<code-snippet name="Pest Smoke Testing Example" lang="php">
+$pages = visit(['/', '/about', '/contact']);
+
+$pages->assertNoJavascriptErrors()->assertNoConsoleLogs();
+</code-snippet>
+@endverbatim