minor #164 [Examples] Add example for choices (chr-hertel)

This PR was merged into the main branch.

Discussion
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[Examples] Add example for choices

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| Docs?         | no
| Issues        |
| License       | MIT

Forgot about that, but wanted at least to add one example.

<img width="680" height="251" alt="image" src="https://github.com/user-attachments/assets/a75e1138-b3a8-4de0-88bc-5596b59e4f59" />

Sometimes with a full stop, but always blue. 🤷‍♂️

Commits
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f37788c Add example for choices

Author: chr-hertel

examples/mistral/chat-multiple.php

@@ -0,0 +1,34 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+use Symfony\AI\Agent\Agent;
+use Symfony\AI\Platform\Bridge\Mistral\Mistral;
+use Symfony\AI\Platform\Bridge\Mistral\PlatformFactory;
+use Symfony\AI\Platform\Message\Message;
+use Symfony\AI\Platform\Message\MessageBag;
+
+require_once dirname(__DIR__).'/bootstrap.php';
+
+$platform = PlatformFactory::create(env('MISTRAL_API_KEY'), http_client());
+$agent = new Agent($platform, new Mistral(), logger: logger());
+
+$messages = new MessageBag(
+    Message::forSystem('Just give short answers.'),
+    Message::ofUser('What is your favorite color?'),
+);
+$result = $agent->call($messages, [
+    'temperature' => 1.5,
+    'n' => 10,
+]);
+
+foreach ($result->getContent() as $key => $choice) {
+    echo sprintf('Choice #%d: %s', ++$key, $choice->getContent()).\PHP_EOL;
+}