fix: using standalone && auto tag set && fielaligment (#103)

example/stream_test.proto

@@ -0,0 +1,17 @@
+syntax = "proto3";
+
+package example;
+
+option go_package = "go.unistack.org/protoc-gen-go-micro/v4/example/out/go;examplepb";
+
+service StreamExample {
+  // server-side streaming
+  rpc ServerStream(StreamReq) returns (stream StreamRsp) {};
+  // client-side streaming
+  rpc ClientStream(stream StreamReq) returns (StreamRsp) {};
+  // bidirectional streaming
+  rpc BidiStream(stream StreamReq) returns (stream StreamRsp) {};
+}
+
+message StreamReq { string name = 1; }
+message StreamRsp { string data = 1; }