Gemini Backend (#9)

Co-authored-by: Ying Sheng <sqy1415@gmail.com>

python/sglang/api.py

@@ -4,6 +4,7 @@ from typing import Callable, List, Optional, Union
 
 from sglang.backend.anthropic import Anthropic
 from sglang.backend.base_backend import BaseBackend
+from sglang.backend.gemini import Gemini
 from sglang.backend.openai import OpenAI
 from sglang.backend.runtime_endpoint import RuntimeEndpoint
 from sglang.global_config import global_config