* breaking: no need to override Serialize/Deserialize in messages
Messages no longer serilize themselves. This has been decoupled. Serializing a message is now done
via readers and writers, which can be either generated or user provided.
This lifts some restrictions,
* you no longer need to have a default constructor in messages
* Messages types can be recursive
* struct Messages don't need to provide an empty Serialize and Deserialize method
Before:
```cs
public struct ReadyMessage : IMessageBase
{
public void Deserialize(NetworkReader reader) { }
public void Serialize(NetworkWriter writer) { }
}
```
After:
```cs
public struct ReadyMessage : IMessageBase
{
}
```
BREAKING CHANGE: Messages must be public
BREAKING CHANGE: Use custom reader and writer instead of Serialize/Deserialize methods
* Remove unused method
* remove unused methods
* remove unused methods
* make all messages struct
* Fix test code generator
* Get rid of MessageBase
* Rename IMessageBase -> NetworkMessage
* add MessageBase as obsolete
* Use a default request
* Empty file to make asset store happy
* Apply suggestions from code review
Co-authored-by: James Frowen <jamesfrowendev@gmail.com>
Co-authored-by: James Frowen <jamesfrowendev@gmail.com>
