feat: Add support for Mistral in configuration (#89)

src/ai-bundle/src/DependencyInjection/AIExtension.php

@@ -33,6 +33,8 @@
 use Symfony\AI\Platform\Bridge\Google\Gemini;
 use Symfony\AI\Platform\Bridge\Google\PlatformFactory as GooglePlatformFactory;
 use Symfony\AI\Platform\Bridge\Meta\Llama;
+use Symfony\AI\Platform\Bridge\Mistral\Mistral;
+use Symfony\AI\Platform\Bridge\Mistral\PlatformFactory as MistralPlatformFactory;
 use Symfony\AI\Platform\Bridge\OpenAI\Embeddings;
 use Symfony\AI\Platform\Bridge\OpenAI\GPT;
 use Symfony\AI\Platform\Bridge\OpenAI\PlatformFactory as OpenAIPlatformFactory;
@@ -212,6 +214,21 @@ private function processPlatformConfig(string $type, array $platform, ContainerB
             return;
         }
 
+        if ('mistral' === $type) {
+            $platformId = 'llm_chain.platform.mistral';
+            $definition = (new Definition(Platform::class))
+                ->setFactory(MistralPlatformFactory::class.'::create')
+                ->setAutowired(true)
+                ->setLazy(true)
+                ->addTag('proxy', ['interface' => PlatformInterface::class])
+                ->setArguments(['$apiKey' => $platform['api_key']])
+                ->addTag('llm_chain.platform');
+
+            $container->setDefinition($platformId, $definition);
+
+            return;
+        }
+
         throw new \InvalidArgumentException(\sprintf('Platform "%s" is not supported for configuration via bundle at this point.', $type));
     }
 
@@ -228,6 +245,7 @@ private function processAgentConfig(string $name, array $config, ContainerBuilde
             'claude' => Claude::class,
             'llama' => Llama::class,
             'gemini' => Gemini::class,
+            'mistral' => Mistral::class,
             default => throw new \InvalidArgumentException(\sprintf('Model "%s" is not supported.', $modelName)),
         };
         $modelDefinition = new Definition($modelClass);

src/ai-bundle/src/DependencyInjection/Configuration.php

@@ -58,6 +58,11 @@ public function getConfigTreeBuilder(): TreeBuilder
                                 ->scalarNode('api_key')->isRequired()->end()
                             ->end()
                         ->end()
+                        ->arrayNode('mistral')
+                            ->children()
+                                ->scalarNode('api_key')->isRequired()->end()
+                            ->end()
+                        ->end()
                     ->end()
                 ->end()
                 ->arrayNode('agent')