refactor(generator): Refactor GeneratorManager to improve readability…

… and maintainability

- Removed unnecessary array_filter usage
- Simplified variable assignment for studlyName
- Improved method_exists and class_exists checks for driver creation
- Added exception handling for unsupported drivers

app/GeneratorManager.php

@@ -46,18 +46,15 @@ protected function createDriver($driver)
  }
 
  $config = $this->config->get("ai-commit.generators.$driver");
- $drivers = array_filter([$driver, $config['driver'] ?? null]);
 
- foreach ($drivers as $d) {
- $studlyName = Str::studly($d);
+ $studlyName = Str::studly($config['driver'] ?? $driver);
 
-  if (method_exists($this, $method = "create{$studlyName}Driver")) {
-  return $this->{$method}($config);
-  }
+ if (method_exists($this, $method = "create{$studlyName}Driver")) {
+ return $this->{$method}($config);
+ }
 
- if (class_exists($class = "App\\Generators\\{$studlyName}Generator")) {
- return new $class($config);
- }
+ if (class_exists($class = "App\\Generators\\{$studlyName}Generator")) {
+ return new $class($config);
  }
 
  throw new InvalidArgumentException("Driver [$driver] not supported.");