createDeepSeekReasoningProvider function
Create a DeepSeek provider for reasoning tasks Uses the deepseek-reasoner model which supports reasoning/thinking
Implementation
DeepSeekProvider createDeepSeekReasoningProvider({
  required String apiKey,
  String model = 'deepseek-reasoner',
  String? systemPrompt,
  double? temperature,
  int? maxTokens,
}) {
  return createDeepSeekProvider(
    apiKey: apiKey,
    model: model,
    systemPrompt: systemPrompt,
    temperature: temperature,
    maxTokens: maxTokens,
  );
}