add train cfg in flow matching

runtime/python/grpc/cosyvoice.proto

@@ -0,0 +1,43 @@
+syntax = "proto3";
+
+package cosyvoice;
+option go_package = "protos/";
+
+service CosyVoice{
+  rpc Inference(Request) returns (Response) {}
+}
+
+message Request{
+  oneof RequestPayload {
+    sftRequest sft_request = 1;
+    zeroshotRequest zero_shot_request = 2;
+    crosslingualRequest cross_lingual_request = 3;
+    instructRequest instruct_request = 4;
+  }
+}
+
+message sftRequest{
+  string spk_id = 1;
+  string tts_text = 2;
+}
+
+message zeroshotRequest{
+  string tts_text = 1;
+  string prompt_text = 2;
+  bytes prompt_audio = 3;
+}
+
+message crosslingualRequest{
+  string tts_text = 1;
+  bytes prompt_audio = 2;
+}
+
+message instructRequest{
+  string tts_text = 1;
+  string spk_id = 2;
+  string instruct_text = 3;
+}
+
+message Response{
+  bytes tts_audio = 1;
+}