dont assume bytes type

[3052]

using this file:

https://github.com/protocolbuffers/protoscope/files/14941355/hello.dmp

I get this result:

> protoscope hello.dmp
1: {12: 9.155902e11i32}   # 0x53552d6ei32

while with other methods I get this result:

protobuf.Message{
   protobuf.Field{Number:1, Type:2, Value:protobuf.Bytes("en-US")},
   protobuf.Field{Number:1, Type:2, Value:protobuf.Message{
      protobuf.Field{Number:12, Type:5, Value:protobuf.Fixed32(1398091118)},
   }},
}

I think it would be useful if protoscope didn't assume type, and just return bytes as is, and also as embedded message, if it parses as such