Project name change to ai_provider_bytedance

Most of ai provider name use company name not model name,
Like：
ai_provider_anthropic not ai_provider_claude
ai_provider_openai not ai_provider_chatgpt

bytedance not just provide dobao model, also provide deepseek v3.1 / kimi / jimeng and so on

So the module name migrate to ai_provider_bytedance is better