Fix network transport

- [x] Reliable transport (framing, order, etc.)
- [x] Prevent spoofing
- [x] Optimised
- [ ] TLS encryption
- [ ] Collect all networkdata and push at every tick
- [ ] Merge data for same entities in the same tick
- [ ] Use [MemoryPack](https://github.com/Cysharp/MemoryPack) for network data