fix: Add null-safe logging method calls

Author: CodeWithKyrian

docs/.vitepress/config.mts

@@ -131,6 +131,6 @@ export default defineConfig({
                 'data-domain': 'codewithkyrian.github.io/transformers-php',
                 'src': 'https://analytics.codewithkyrian.com/js/script.js'
             }
-        ]
+        ],
     ]
 })

src/Models/Auto/PretrainedMixin.php

@@ -74,7 +74,7 @@ public static function fromPretrained(
         }
 
         if (static::BASE_IF_FAIL) {
-            Transformers::getLogger()->warning("Unknown model class for model type {$config->modelType}. Using base class PreTrainedModel.");
+            Transformers::getLogger()?->warning("Unknown model class for model type {$config->modelType}. Using base class PreTrainedModel.");
 
             return PretrainedModel::fromPretrained(
                 modelNameOrPath: $modelNameOrPath,

src/Models/Pretrained/PretrainedModel.php

@@ -359,7 +359,7 @@ public function validateInputs(array $inputNames, array $inputs): array
                 implode(', ', $ignored)
             );
 
-            Transformers::getLogger()->warning($warning);
+            Transformers::getLogger()?->warning($warning);
         }
 
         return $inputs;