Gemini Backend (#9)

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

examples/quick_start/gemini_example_stream.py

@@ -0,0 +1,20 @@
+from sglang import function, user, assistant, gen, set_default_backend, Gemini
+
+
+@function
+def multi_turn_question(s, question_1, question_2):
+    s += user(question_1)
+    s += assistant(gen("answer_1", max_tokens=256))
+    s += user(question_2)
+    s += assistant(gen("answer_2", max_tokens=256))
+
+set_default_backend(Gemini("gemini-pro"))
+
+state = multi_turn_question.run(
+    question_1="What is the capital of the United States?",
+    question_2="List two local attractions.",
+    stream=True
+)
+
+for out in state.text_iter():
+    print(out, end="", flush=True)