minor #72 chore: remove occurrences of empty() (alexandre-daubois, chr-hertel)

This PR was merged into the main branch.

Discussion
----------

chore: remove occurrences of `empty()`

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

Cherry picking php-llm/llm-chain#374

Commits
-------

c0d688f chore: use [] checks instead of count with zero on array
fb3d1a8 chore: use isset instead of bool cast on $_ENV
14c448c chore: remove occurrences of `empty()` (#374)

Author: chr-hertel

src/DependencyInjection/AIExtension.php

@@ -271,7 +271,7 @@ private function processAgentConfig(string $name, array $config, ContainerBuilde
         if (null !== $version) {
             $modelDefinition->setArgument('$name', $version);
         }
-        if (0 !== \count($options)) {
+        if ([] !== $options) {
             $modelDefinition->setArgument('$options', $options);
         }
         $modelDefinition->addTag('symfony_ai.model.language_model');
@@ -289,7 +289,7 @@ private function processAgentConfig(string $name, array $config, ContainerBuilde
         // TOOL & PROCESSOR
         if ($config['tools']['enabled']) {
             // Create specific toolbox and process if tools are explicitly defined
-            if (0 !== \count($config['tools']['services'])) {
+            if ([] !== $config['tools']['services']) {
                 $memoryFactoryDefinition = new Definition(MemoryToolFactory::class);
                 $container->setDefinition('symfony_ai.toolbox.'.$name.'.memory_factory', $memoryFactoryDefinition);
                 $chainFactoryDefinition = new Definition(ChainFactory::class, [
@@ -479,7 +479,7 @@ private function processIndexerConfig(int|string $name, array $config, Container
         if (null !== $version) {
             $modelDefinition->setArgument('$name', $version);
         }
-        if (0 !== \count($options)) {
+        if ([] !== $options) {
             $modelDefinition->setArgument('$options', $options);
         }
         $modelDefinition->addTag('symfony_ai.model.embeddings_model');