Refactor system architecture (#109)

cacheflow/__init__.py

@@ -0,0 +1,19 @@
+from cacheflow.outputs import RequestOutput
+from cacheflow.sampling_params import SamplingParams
+from cacheflow.server.arg_utils import (
+    add_server_arguments,
+    create_server_configs_from_args,
+    initialize_server_from_args,
+)
+from cacheflow.server.llm_server import LLMServer
+from cacheflow.server.ray_utils import initialize_cluster
+
+__all__ = [
+    "RequestOutput",
+    "SamplingParams",
+    "LLMServer",
+    "add_server_arguments",
+    "create_server_configs_from_args",
+    "initialize_server_from_args",
+    "initialize_cluster",
+]