PBJ does not support packed repeated field

### Description

Protobuf supports the option of packed encoding for repeated numeric fields. We do not use this today in HAPI so it is not yet supported in PBJ.

```
message Test5 {
repeated int32 f = 6 [packed=true];
}
```

https://developers.google.com/protocol-buffers/docs/encoding#packed

### Steps to reproduce

Create a protobuf with a field like: `repeated int32 f = 6 [packed=true];`

### Additional context

_No response_

### Hedera network

other

### Version

0.1.0

### Operating system

None